@article{IVM_2021_6_a7,
     author = {S. E. Usmanov},
     title = {The boundedness of maximal operators associated with singular surfaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {84--94},
     publisher = {mathdoc},
     number = {6},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2021_6_a7/}
}