@article{GDZPPN002355361, title = {A proof of the Mackey-Blattner-Nielsen theorem.}, journal = {Mathematica Scandinavica}, volume = {43}, year = {1978}, pages = {329-335}, zbl = {0426.22008}, url = {http://dml.mathdoc.fr/item/GDZPPN002355361} }
Kehlet, Esben T. A proof of the Mackey-Blattner-Nielsen theorem.. Mathematica Scandinavica, Tome 43 (1978) pp. 329-335. http://gdmltest.u-ga.fr/item/GDZPPN002355361/