TY  - JOUR
AU  - Zelinka, Bohdan
TI  - Double covers and logics of graphs
JO  - Czechoslovak Mathematical Journal
PY  - 1983
SP  - 354
EP  - 360
VL  - 33
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1983.101887/
DO  - 10.21136/CMJ.1983.101887
LA  - en
ID  - 10_21136_CMJ_1983_101887
ER  -