@inproceedings{SAC-1997-Shen,
	author        = "Zhizhang Shen",
	booktitle     = "{Proceedings of the 12th Symposium on Applied Computing}",
	doi           = "10.1145/331697.331707",
	pages         = "40--44",
	publisher     = "{ACM}",
	title         = "{The average diameter of binary tree structures}",
	year          = 1997,
}