Kenneth A. Berman. A note on coloured quadrangulations. Discrete Mathematics, 29(2):215-217, 1980. [doi]
@article{Berman80-0,
title = {A note on coloured quadrangulations},
author = {Kenneth A. Berman},
year = {1980},
doi = {10.1016/0012-365X(80)90011-4},
url = {http://dx.doi.org/10.1016/0012-365X(80)90011-4},
researchr = {https://researchr.org/publication/Berman80-0},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {29},
number = {2},
pages = {215-217},
}