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@article{ARM_1991__27_3-4_a6, author = {Vetch\'y, Vladim{\'\i}r}, title = {Metrically regular square of metrically regular bigraphs. {I}}, journal = {Archivum mathematicum}, pages = {183--197}, publisher = {mathdoc}, volume = {27}, number = {3-4}, year = {1991}, mrnumber = {1189214}, zbl = {0764.05068}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1991__27_3-4_a6/} }
Vetchý, Vladimír. Metrically regular square of metrically regular bigraphs. I. Archivum mathematicum, Tome 27 (1991) no. 3-4, pp. 183-197. http://geodesic.mathdoc.fr/item/ARM_1991__27_3-4_a6/