@article{01083064, title = {On factorization and partial indices of unitary matrix-functions of one class.}, journal = {Georgian Mathematical Journal}, volume = {4}, year = {1997}, pages = {439-442}, doi = {10.1023/A:1022972315465}, zbl = {0893.47011}, language = {en}, url = {http://dml.mathdoc.fr/item/01083064} }
Janashia, G.; Lagvilava, E. On factorization and partial indices of unitary matrix-functions of one class.. Georgian Mathematical Journal, Tome 4 (1997) pp. 439-442. doi : 10.1023/A:1022972315465. http://gdmltest.u-ga.fr/item/01083064/