%0 Journal Article %A G. Nakamura %A S. Plaszczynski %A B. Grammaticos %A M. Badoual %T Modelling the Effect of Virulent Variants with SIR %J Russian journal of nonlinear dynamics %D 2021 %P 475-490 %V 17 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ND_2021_17_4_a8/ %G en %F ND_2021_17_4_a8