%0 Journal Article %A Reinhard Bürger %T Perturbations of Positive Semigroups and Applications to Population Genetics. %J Mathematische Zeitschrift %D 1988 %P 259-272 %V 197 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1988__197_1_183731/ %F MZ_1988__197_1_183731