Ahmed M. Aly, Walid G. Aref, Mourad Ouzzani. Spatial Queries with Two kNN Predicates. PVLDB, 5(11):1100-1111, 2012. [doi]
@article{AlyAO12, title = {Spatial Queries with Two kNN Predicates}, author = {Ahmed M. Aly and Walid G. Aref and Mourad Ouzzani}, year = {2012}, url = {http://vldb.org/pvldb/vol5/p1100_ahmedmaly_vldb2012.pdf}, researchr = {https://researchr.org/publication/AlyAO12}, cites = {0}, citedby = {0}, journal = {PVLDB}, volume = {5}, number = {11}, pages = {1100-1111}, }