Notes on searching in multidimensional monotone arraysAlok AggarwalJames Park1987FOCS 1987Conference paper
Results on learnability and the Vapnik-Chervonenkis dimensionNathan LinialYishay Mansouret al.1987FOCS 1987Conference paper
Reachability is harder for directed than for undirected finite graphsMiklos AjtaiRonald Fagin1987FOCS 1987Conference paper