@article{1102946329, author = {Schmidt, H. J.}, title = {The ${\cal F}$-depth of an ${\cal F}$-projector.}, journal = {Pacific J. Math.}, volume = {49}, number = {2}, year = {1973}, pages = { 537-547}, language = {en}, url = {http://dml.mathdoc.fr/item/1102946329} }
Schmidt, H. J. The ${\cal F}$-depth of an ${\cal F}$-projector.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 537-547. http://gdmltest.u-ga.fr/item/1102946329/