@article{ZNSL_2021_503_a2,
     author = {O. L. Vinogradov},
     title = {Logarithmically absolutely monotone trigonometric functions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {57--71},
     publisher = {mathdoc},
     volume = {503},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2021_503_a2/}
}