Guttman, Antonin (1984). „R-trees”. Proceedings of the 1984 ACM SIGMOD international conference on Management of data - SIGMOD '84. стр. 47. ISBN0897911288. S2CID876601. doi:10.1145/602259.602266.
Ang, C. H.; Tan, T. C. (1997). „New linear node splitting algorithm for R-trees”. Advances in Spatial Databases. Lecture Notes in Computer Science. 1262. стр. 337—349. ISBN978-3-540-63238-2. doi:10.1007/3-540-63238-7_38.
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Guttman, Antonin (1984). „R-trees”. Proceedings of the 1984 ACM SIGMOD international conference on Management of data - SIGMOD '84. стр. 47. ISBN0897911288. S2CID876601. doi:10.1145/602259.602266.