%0 Journal Article %A Tahar Z. Boulmezaoud %T A discrete epidemic model and a zigzag strategy for curbing the Covid-19 outbreak and for lifting the lockdown %J Mathematical modelling of natural phenomena %D 2020 %V 15 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1051/mmnp/2020043/ %R 10.1051/mmnp/2020043 %G en %F MMNP_2020_15_a19