@misc{IM2_2021_85_5_a0,
     title = {Vladimir {Leonidovich} {Popov} (congratulation)},
     journal = {Izvestiya. Mathematics},
     pages = {I},
     year = {2021},
     volume = {85},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2021_85_5_a0/}
}