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@article{MZM_1971_10_2_a11, author = {V. S. Shul'man}, title = {The relation between lebesgue integrable and {Birkhoff--Khinchin} summable functions}, journal = {Matemati\v{c}eskie zametki}, pages = {219--228}, publisher = {mathdoc}, volume = {10}, number = {2}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1971_10_2_a11/} }
V. S. Shul'man. The relation between lebesgue integrable and Birkhoff--Khinchin summable functions. Matematičeskie zametki, Tome 10 (1971) no. 2, pp. 219-228. http://geodesic.mathdoc.fr/item/MZM_1971_10_2_a11/