@article{1178241337, author = {Bouldin, Richard}, title = {The product of operators with closed range}, journal = {Tohoku Math. J. (2)}, volume = {25}, number = {4}, year = {1973}, pages = { 359-363}, language = {en}, url = {http://dml.mathdoc.fr/item/1178241337} }
Bouldin, Richard. The product of operators with closed range. Tohoku Math. J. (2), Tome 25 (1973) no. 4, pp. 359-363. http://gdmltest.u-ga.fr/item/1178241337/