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@article{MV_1972_24_1_a5, author = {A. R. Amir-Mo\'ez and W. A. Donnell and C. R. Perry}, title = {On the arguments of proper values of normal and unitary transformations}, journal = {Matemati\v{c}ki vesnik}, pages = {39 }, publisher = {mathdoc}, volume = {24}, number = {1}, year = {1972}, url = {http://geodesic.mathdoc.fr/item/MV_1972_24_1_a5/} }
A. R. Amir-Moéz; W. A. Donnell; C. R. Perry. On the arguments of proper values of normal and unitary transformations. Matematički vesnik, Tome 24 (1972) no. 1, p. 39 . http://geodesic.mathdoc.fr/item/MV_1972_24_1_a5/