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@article{Gnevyshev:1967,
author = {M. N. Gnevyshev},
title = {The eleven year cycle of solar activity},
publisher = {Physics-Uspekhi},
year = {1967},
journal = {Phys. Usp.},
volume = {9},
number = {5},
pages = {752-758},
url = {https://ufn.ru/en/articles/1967/5/g/},
doi = {10.1070/PU1967v009n05ABEH003217}
}
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