Joseph M. Hellerstein Elias Koutsoupias Daniel P. Miranker Christos H. Papadimitriou Vasilis Samoladas On a model of indexability and its bounds for range queries. 35-55 2002 49 J. ACM 1 http://doi.acm.org/10.1145/505241.505244 db/journals/jacm/jacm49.html#HellersteinKMPS02