@article{ZNSL_2020_490_a6,
     author = {A. L. Smirnov},
     title = {On explicit units in {Kummer's} tower},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {109--123},
     publisher = {mathdoc},
     volume = {490},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2020_490_a6/}
}