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@article{ARM_1992__28_1-2_a9, author = {Niederle, Josef}, title = {On frame congruences generated by frame tolerances}, journal = {Archivum mathematicum}, pages = {77--81}, publisher = {mathdoc}, volume = {28}, number = {1-2}, year = {1992}, mrnumber = {1201868}, zbl = {0787.08003}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1992__28_1-2_a9/} }
Niederle, Josef. On frame congruences generated by frame tolerances. Archivum mathematicum, Tome 28 (1992) no. 1-2, pp. 77-81. http://geodesic.mathdoc.fr/item/ARM_1992__28_1-2_a9/