TY  - JOUR
AU  - Chu, Yanan
AU  - Sun, Lei
AU  - Yue, Jun
TI  - Note on improper coloring of $1$-planar graphs
JO  - Czechoslovak Mathematical Journal
PY  - 2019
SP  - 955
EP  - 968
VL  - 69
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2019.0558-17/
DO  - 10.21136/CMJ.2019.0558-17
LA  - en
ID  - 10_21136_CMJ_2019_0558_17
ER  -