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@article{MM2_1972__6_154095, author = {A.K. Dewdney}, title = {The {Chromatic} {Number} of a {Class} of {Pseudo-2-Manifolds.}}, journal = {Manuscripta mathematica}, pages = {311--320}, publisher = {mathdoc}, volume = {6}, year = {1972}, zbl = {0229.05112}, url = {http://geodesic.mathdoc.fr/item/MM2_1972__6_154095/} }
A.K. Dewdney. The Chromatic Number of a Class of Pseudo-2-Manifolds.. Manuscripta mathematica, Tome 6 (1972), pp. 311-320. http://geodesic.mathdoc.fr/item/MM2_1972__6_154095/