@article{10_26493_1855_3974_1615_979, author = {Shude Long and Han Ren}, title = { 4-edge-connected 4-regular maps on the projective plane }, journal = {Ars mathematica contemporanea}, pages = {51--71}, year = {2020}, volume = {18}, number = {1}, doi = {10.26493/1855-3974.1615.979}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.26493/1855-3974.1615.979/} }