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@article{10_4064_fm_57_2_195_203, author = {J. Boland}, title = {Embedding of graphs in the projective plane}, journal = {Fundamenta Mathematicae}, pages = {195--203}, publisher = {mathdoc}, volume = {57}, number = {2}, year = {1965}, doi = {10.4064/fm-57-2-195-203}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-57-2-195-203/} }
J. Boland. Embedding of graphs in the projective plane. Fundamenta Mathematicae, Tome 57 (1965) no. 2, pp. 195-203. doi : 10.4064/fm-57-2-195-203. http://geodesic.mathdoc.fr/articles/10.4064/fm-57-2-195-203/
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