@article{05627610, title = {The numerical range of Toeplitz operator on the polydisk.}, journal = {Abstract and Applied Analysis}, volume = {2009}, year = {2009}, doi = {10.1155/2009/757964}, zbl = {1176.30102}, language = {en}, url = {http://dml.mathdoc.fr/item/05627610} }
Gu, Dinggui. The numerical range of Toeplitz operator on the polydisk.. Abstract and Applied Analysis, Tome 2009 (2009) . doi : 10.1155/2009/757964. http://gdmltest.u-ga.fr/item/05627610/