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@article{MZM_1987_42_1_a5, author = {V. E. Slyusarchuk}, title = {Theory of invertibility of periodic operators}, journal = {Matemati\v{c}eskie zametki}, pages = {50--59}, publisher = {mathdoc}, volume = {42}, number = {1}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1987_42_1_a5/} }
V. E. Slyusarchuk. Theory of invertibility of periodic operators. Matematičeskie zametki, Tome 42 (1987) no. 1, pp. 50-59. http://geodesic.mathdoc.fr/item/MZM_1987_42_1_a5/