%0 Journal Article
%A Marek Kochańczyk
%A Frederic Grabowski
%A Tomasz Lipniacki
%T Dynamics of COVID-19 pandemic at constant and time-dependent contact rates
%J Mathematical modelling of natural phenomena
%D 2020
%V 15
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.1051/mmnp/2020011/
%R 10.1051/mmnp/2020011
%G en
%F MMNP_2020_15_a4