@article{MASLO_1971_21_1_a1,
author = {Fiam\v{c}{\'\i}k, Jozef},
title = {Simultaneous {Colouring} of {4-Valent} {Maps}},
journal = {Mathematica slovaca},
pages = {9--13},
year = {1971},
volume = {21},
number = {1},
mrnumber = {0357196},
zbl = {0213.50704},
language = {en},
url = {http://geodesic.mathdoc.fr/item/MASLO_1971_21_1_a1/}
}
Fiamčík, Jozef. Simultaneous Colouring of 4-Valent Maps. Mathematica slovaca, Tome 21 (1971) no. 1, pp. 9-13. http://geodesic.mathdoc.fr/item/MASLO_1971_21_1_a1/
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