conf/pods/87 Foto N. Afrati Christos H. Papadimitriou The Parallel Complexity of Simple Chain Queries. 210-213 1987 PODS db/conf/pods/pods87.html#AfratiP87 http://doi.acm.org/10.1145/28659.28682 db/conf/pods/AfratiP87.html journals/anthology/cd1-3:PODS87/P210.PDF journals/anthology/dvd1:text/1-3/PODS87/P210.PDF ... conf/pods/CosmadakisK86 ... ... conf/focs/UllmanG86