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@article{10_4064_cm_45_1_145_154, author = {Z. Majcher}, title = {On k-closure operators in graphs. {II}}, journal = {Colloquium Mathematicum}, pages = {145--154}, publisher = {mathdoc}, volume = {45}, number = {1}, year = {1981}, doi = {10.4064/cm-45-1-145-154}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-45-1-145-154/} }
Z. Majcher. On k-closure operators in graphs. II. Colloquium Mathematicum, Tome 45 (1981) no. 1, pp. 145-154. doi : 10.4064/cm-45-1-145-154. http://geodesic.mathdoc.fr/articles/10.4064/cm-45-1-145-154/
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