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@article{MZM_1968_3_5_a14, author = {A. F. Lavrik}, title = {Functional and approximate functional equations of the {Dirichlet} function}, journal = {Matemati\v{c}eskie zametki}, pages = {613--622}, publisher = {mathdoc}, volume = {3}, number = {5}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1968_3_5_a14/} }
A. F. Lavrik. Functional and approximate functional equations of the Dirichlet function. Matematičeskie zametki, Tome 3 (1968) no. 5, pp. 613-622. http://geodesic.mathdoc.fr/item/MZM_1968_3_5_a14/