@article{DAN_1972_206_2_a5,
     author = {E. A. Larionov},
     title = {On bases composed of root vectors of an operator bundle},
     journal = {Doklady Akademii Nauk},
     pages = {283--286},
     publisher = {mathdoc},
     volume = {206},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_206_2_a5/}
}