@article{GDZPPN002216086, title = {Induced morphisms for Lambek invariants of commutative squares.}, journal = {Manuscripta mathematica}, volume = {4}, year = {1971}, pages = {263-276}, zbl = {0212.35102}, url = {http://dml.mathdoc.fr/item/GDZPPN002216086} }
Nomura, Yasutoshi. Induced morphisms for Lambek invariants of commutative squares.. Manuscripta mathematica, Tome 4 (1971) pp. 263-276. http://gdmltest.u-ga.fr/item/GDZPPN002216086/