@article{SM_1974_22_4_a9,
     author = {A. A. Pankov},
     title = {The multiplicative structure and characteristic sets of holomorphic {Noetherian} operator-valued functions},
     journal = {Sbornik. Mathematics},
     pages = {603--618},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1974_22_4_a9/}
}