A general approach to the existence of minimizers of one-dimensional non-coercive integrals of the calculus of variations Bernard Botteron, Paolo Marcellini (1991) Annales de l'I.H.P. Analyse non linéaire
A simple mathematical model for Batesian mimicry. Blows, Terence R., Wimmer, Barry J. (2005) Discrete Dynamics in Nature and Society