@article{MZM_1967_1_5_a11,
     author = {E. A. Larionov},
     title = {A commutative family of operators in a space with indefinite metric},
     journal = {Matemati\v{c}eskie zametki},
     pages = {589--594},
     publisher = {mathdoc},
     volume = {1},
     number = {5},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1967_1_5_a11/}
}