@inproceedings{SAC-1998-NascimentoS,
	author        = "Mario A. Nascimento and Jefferson R. O. Silva",
	booktitle     = "{Proceedings of the 13th Symposium on Applied Computing}",
	doi           = "10.1145/330560.330692",
	pages         = "235--240",
	publisher     = "{ACM}",
	title         = "{Towards historical R-trees}",
	year          = 1998,
}