Geometric Stability Switch Criteria in Delay Differential Systems with Delay Dependent Parameters. - Edoardo Beretta; Yang Kuang (SIAM J. Math. Anal., 2002)

A Stage-structured Predator-prey Model of Beddington-DeAngelis Type. - Shengqiang Liu; Edoardo Beretta (SIAM J. Appl. Math., 2006)