Identification of some of the basic styles of tree structures can be found in:
*[[Jacques Bertin]], ''Semiology of Graphics'', 1983, University of Wisconsin Press (2nd edition 1973, {{ISBN|978-0299090609}};
*[[Donald E. Knuth]], ''"[[The Art of Computer Programming]]''", ''Volume I: Fundamental Algorithms'', 1968, Addison-Wesley, pp. 309–310;
*Brian Johnson and [[Ben Shneiderman]], ''"[http://ieeexplore.ieee.org/document/175815 Tree-maps: A space-filling approach to the visualization of hierarchical information structures]''", in ''Proceedings of [[IEEE]] Visualization (VIS)'', 1991, pp. 284–291, {{ISBN|0-8186-2245-8}};
*[[Peter Eades]], Tao Lin, and Xuemin Lin, ''"Two Tree Drawing Conventions''", ''International Journal of Computational Geometry and Applications'', 1993, volume 3, number 2, pp. 133–153.
*[[{{cite book |author1=Manuel Lima]], ''|author1-link=Manuel Lima |title=The Book of Trees: Visualizing Branches of Knowledge'' (|date=2014), [[|publiser=Princeton Architectural Press]],|___location=New York {{ISBN|isbn=978-1-616-89218-0 |edition=First}}
== External links ==
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