Jorge Castro. How Many Query Superpositions Are Needed to Learn?. In José L. Balcázar, Philip M. Long, Frank Stephan, editors, Algorithmic Learning Theory, 17th International Conference, ALT 2006, Barcelona, Spain, October 7-10, 2006, Proceedings. Volume 4264 of Lecture Notes in Computer Science, pages 78-92, Springer, 2006. [doi]