@article{GDZPPN002411288, title = {On Polynomials in Several Hilbert Space Operators.}, journal = {Mathematische Zeitschrift}, volume = {129}, year = {1972}, pages = {224-234}, zbl = {0256.47004}, url = {http://dml.mathdoc.fr/item/GDZPPN002411288} }
Hirschfeld, Rudolf A. On Polynomials in Several Hilbert Space Operators.. Mathematische Zeitschrift, Tome 129 (1972) pp. 224-234. http://gdmltest.u-ga.fr/item/GDZPPN002411288/