@article{VSGTU_2018_22_4_a0,
     author = {V. P. Burskii},
     title = {On differential operators and differential equations on torus},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {607--619},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2018_22_4_a0/}
}