@article{00733113, title = {Roots of the phase operators.}, journal = {Georgian Mathematical Journal}, volume = {2}, year = {1995}, pages = {37-43}, doi = {10.1007/BF02257732}, zbl = {0822.47058}, language = {en}, url = {http://dml.mathdoc.fr/item/00733113} }
Jorjadze, G.; Sarishvili, I. Roots of the phase operators.. Georgian Mathematical Journal, Tome 2 (1995) pp. 37-43. doi : 10.1007/BF02257732. http://gdmltest.u-ga.fr/item/00733113/