%0 Journal Article %A P. Rybka %A Q. Tang %A D. Waxman %T Evolution in a changing environment: existence of solutions %J Colloquium Mathematicum %D 2003 %P 97-111 %V 98 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm98-1-8/ %R 10.4064/cm98-1-8 %G en %F 10_4064_cm98_1_8