%0 Journal Article %A A. Yu. Perevarukha %T Cyclical fluctuations and step-wise changes in new models of population dynamic %J Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki %D 2008 %P 116-125 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VUU_2008_3_a13/ %G ru %F VUU_2008_3_a13