@article{01985411, title = {Subspaces of }, journal = {The New York Journal of Mathematics [electronic only]}, volume = {9}, year = {2003}, pages = {137-140}, zbl = {1038.46003}, language = {en}, url = {http://dml.mathdoc.fr/item/01985411} }
Allis, James T. Subspaces of . The New York Journal of Mathematics [electronic only], Tome 9 (2003) pp. 137-140. http://gdmltest.u-ga.fr/item/01985411/