@misc{UFA_2021_13_4_a11,
     title = {In memory of {Napalkov} {Valentin} {Vasilievich}},
     journal = {Ufa mathematical journal},
     pages = {131--133},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2021_13_4_a11/}
}