@article{1225376785, author = {WIERZBICKI, Jerzy}, title = {On commutativity of diagrams of type $\Pi\_{1}$ factors}, journal = {J. Math. Soc. Japan}, volume = {50}, number = {4}, year = {1998}, pages = { 23-42}, language = {en}, url = {http://dml.mathdoc.fr/item/1225376785} }
WIERZBICKI, Jerzy. On commutativity of diagrams of type $\Pi_{1}$ factors. J. Math. Soc. Japan, Tome 50 (1998) no. 4, pp. 23-42. http://gdmltest.u-ga.fr/item/1225376785/