@article {MR2203542, title = {The evolution of periodic population systems under random environments}, journal = {Tohoku Math. J. (2)}, volume = {57}, number = {4}, year = {2005}, pages = {447{\textendash}468}, issn = {0040-8735}, url = {http://projecteuclid.org/euclid.tmj/1140727068}, author = {Nguyen Huu Du and Kon, Ryusuke and Sato, Kazunori and Takeuchi, Yasuhiro} }