Leslie Astudillo Patricia Melin Oscar Castillo A New Optimization Method Based on a Paradigm Inspired by Nature. 277-283 2010 Soft Computing for Recognition Based on Biometrics http://dx.doi.org/10.1007/978-3-642-15111-8_17 series/sci/2010-312 db/series/sci/sci312.html#AstudilloMC10