@article{IM2_1980_14_2_a7,
     author = {V. S. Pilidi},
     title = {On~invariant subspaces of multiple weighted shift operators},
     journal = {Izvestiya. Mathematics },
     pages = {345--365},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1980_14_2_a7/}
}