Elegant, instructive examples of functional programming. Supposed to be fun, and teach important programming techniques and fundamental design principles. Traditionally appear in Journal of Functional Programming, and at ICFP and affiliated workshops.
J. Koza. Parallel Problem Solving from Nature - Proceedings of
1st Workshop, PPSN 1, volume 496 of Lecture Notes in Computer Science, page 124--128. Dortmund, Germany, Springer-Verlag, (1-3 October 1991)