@article{IM2_1980_15_3_a4,
     author = {E. M. Nikishin},
     title = {On logarithms of natural numbers},
     journal = {Izvestiya. Mathematics },
     pages = {523--530},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1980_15_3_a4/}
}