conf/pods/87 Alberto Marchetti-Spaccamela Antonella Pelaggi Domenico Saccà Worst-case Complexity Analysis of Methods for Logic Query Implementation. 294-301 1987 PODS db/conf/pods/pods87.html#Marchetti-SpaccamelaPS87 http://doi.acm.org/10.1145/28659.28691 db/conf/pods/Marchetti-SpaccamelaPS87.html journals/anthology/cd1-3:PODS87/P294.PDF journals/anthology/dvd1:text/1-3/PODS87/P294.PDF conf/pods/BancilhonMSU86 conf/sigmod/BancilhonR86 journals/jacm/HenschenN84 conf/pods/SaccaZ86 conf/icdt/SaccaZ86 conf/iclp/SaccaZ87 conf/sigmod/SaccaZ87 books/cs/Ullman82 journals/tods/Ullman85