%0 Journal Article %A Mohamed Abo-Elhamayel %T Bi-covering rough sets %J Filomat %D 2021 %P 2361 %V 35 %N 7 %U http://geodesic.mathdoc.fr/articles/10.2298/FIL2107361A/ %R 10.2298/FIL2107361A %G en %F 10_2298_FIL2107361A