@inproceedings{SIGMOD-1987-NelsonS,
	author        = "Randal C. Nelson and Hanan Samet",
	booktitle     = "{Proceedings of the 17th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD87/P270.PDF",
	doi           = "10.1145/38713.38744",
	pages         = "270--277",
	title         = "{A Population Analysis for Hierarchical Data Structures}",
	year          = 1987,
}