@article{GDZPPN002418223, title = {Extreme Contraction Operators on l...}, journal = {Mathematische Zeitschrift}, volume = {147}, year = {1976}, pages = {101-110}, zbl = {0321.47025}, url = {http://dml.mathdoc.fr/item/GDZPPN002418223} }
Kim, Choo-whan. Extreme Contraction Operators on l.... Mathematische Zeitschrift, Tome 147 (1976) pp. 101-110. http://gdmltest.u-ga.fr/item/GDZPPN002418223/