\begin{thebibliography}{10}                                                     
                                                                                
\bibitem{Tables}                                                                
R.~J. Beach.                                                                    
\newblock {\it Setting Tables and Illustrations with Style}.                    
\newblock PhD thesis, University of Waterloo, 1985.                             
                                                                                
\bibitem{Karlsruhe}                                                             
A. Br{\"u}ggemann-Klein, P. Dolland, and A. Heinz.                              
\newblock How to please authors and publishers: a versatile document            
  preparation system at {K}arlsruhe.                                            
\newblock In J. D\'esarm\'enien, editor, {\it {\TeX{}} for Scientific           
  Documentation}, Strasbourg, France, June 1986.                                
\newblock LNCS~236.                                                             
                                                                                
\bibitem{TreeTeX}                                                               
A. Br{\"u}ggemann-Klein and D. Wood.                                            
\newblock {\it Tree{\TeX}: Documentation and User Handbook}.                    
\newblock Technical Report, University of Waterloo, 1987.                       
                                                                                
\bibitem{AverageHeight}                                                         
N.G. de~Bruijn, D. Knuth, and S.O. Rice.                                        
\newblock The average height of planted plane trees.                            
\newblock In R.C. Read, editor, {\it Graph Theory and Computing}, 1972.         
                                                                                
\bibitem{BinarySearchTrees}                                                     
L. Devroye.                                                                     
\newblock A note on the height of binary search trees.                          
\newblock {\it Journal of the ACM}, 33(3), July 1986.                           
                                                                                
\bibitem{BinaryTrees}                                                           
Ph. Flajolet and A. Odlyzko.                                                    
\newblock The average height of binary trees and other simple trees.            
\newblock {\it Journal of Computer and System Sciences}, 25, 1982.              
                                                                                
\bibitem{DocumentFormatting}                                                    
R. Furuta, J. Scofield, and A. Shaw.                                            
\newblock Document formatting systems: surveys, concepts, issues.               
\newblock {\it Computing Surveys}, 14(3), 1982.                                 
                                                                                
\bibitem{GML}                                                                   
Ch.~F. Goldfarb.                                                                
\newblock A generalized approach to document markup.                            
\newblock {\it SIGPLAN Notices of the ACM}, June 1981.                          
                                                                                
\bibitem{ACP}                                                                   
D.~E. Knuth.                                                                    
\newblock {\it Fundamental Algorithms}.                                         
\newblock Volume~1 of {\it The Art of Computer Programming}, Addison-Wesley,    
  Reading, Massachusetts, 1973.                                                 
                                                                                
\bibitem{TeXbook}                                                               
D.~E. Knuth.                                                                    
\newblock {\it The {\TeX{}}book}.                                               
\newblock Volume~A of {\it Computers \& Typesetting}, Addison-Wesley, Reading,  
  Massachusetts, 1986.                                                          
                                                                                
\bibitem{LaTeX}                                                                 
L. Lamport.                                                                     
\newblock {\it {\LaTeX}, User's Guide \& Reference Manual}.                     
\newblock Addison-Wesley, Reading, Massachusetts, 1986.
 
\bibitem{Brother}
Th. Ottmann, H.-W. Six.
\newblock Eine neue Klasse ausgeglichener Bin\"arb\"aume.
\newblock {\it Angewandte Informatik}, 9, 1976.                         
                                                                                
\bibitem{Grif}                                                                  
V. Quint, I. Vatton, and H. Bedor.                                              
\newblock Grif: an interactive environment for {\TeX{}}.                        
\newblock In J. D\'esarm\'enien, editor, {\it {\TeX{}} for Scientific           
  Documentation}, Strasbourg, France, June 1986.                                
\newblock LNCS~236.                                                             
                                                                                
\bibitem{Scribe}                                                                
B.~K. Reid.                                                                     
\newblock {\it Scribe: A Document Specification Language and its Compiler}.     
\newblock PhD thesis, Carnegie Mellon University, 1980.                         
                                                                                
\bibitem{TidierTrees}                                                           
E.~M. Reingold and J.~S. Tilford.                                               
\newblock Tidier drawings of tree.                                              
\newblock {\it IEEE Transactions on Software Engineering}, 7(2), March 1981.    
                                                                                
\bibitem{Complexity}                                                            
K.~J. Supowit and E.~M. Reingold.                                               
\newblock The complexity of drawing trees nicely.                               
\newblock {\it Acta Informatica}, 18, 1983.                                     
                                                                                
\bibitem{TidyTrees}                                                             
Ch. Wetherell and A. Shannon.                                                   
\newblock Tidy drawings of trees.                                               
\newblock {\it IEEE Transactions on Software Engineering}, 5(5), September      
  1979.                                                                         
                                                                                
\end{thebibliography}