M. Kusner, Y. Sun, N. Kolkin, and K. Weinberger. Proceedings of the 32Nd International Conference on International Conference on Machine Learning - Volume 37, page 957--966. JMLR.org, (2015)
C. Runciman, and I. Toyn. Proceedings of the Conference on Functional Programming Languages and
Computer Architecture '89, Imperial College, London, page 166--173. New York, NY, ACM, (1989)