Dan E. Willard. Sampling Algorithms for Differential Batch Retrieval Problems (Extended Abstract). In Jan Paredaens, editor, Automata, Languages and Programming, 11th Colloquium, Antwerp, Belgium, July 16-20, 1984, Proceedings. Volume 172 of Lecture Notes in Computer Science, pages 514-526, Springer, 1984.
Abstract is missing.