@article{GDZPPN002351765, title = {On Classes of Projections in a von Neumann Algebra.}, journal = {Mathematica Scandinavica}, volume = {30}, year = {1972}, pages = {191-200}, zbl = {0252.46074}, url = {http://dml.mathdoc.fr/item/GDZPPN002351765} }
Digernes, Trond. On Classes of Projections in a von Neumann Algebra.. Mathematica Scandinavica, Tome 30 (1972) pp. 191-200. http://gdmltest.u-ga.fr/item/GDZPPN002351765/