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@article{TRSPY_1987_180_a79, author = {B. D. Kotlyar}, title = {Fourier coefficients and densities of subsets of the series of natural numbers}, journal = {Informatics and Automation}, pages = {140--141}, publisher = {mathdoc}, volume = {180}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a79/} }
B. D. Kotlyar. Fourier coefficients and densities of subsets of the series of natural numbers. Informatics and Automation, Theory of functions and related questions of analysis, Tome 180 (1987), pp. 140-141. http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a79/