@misc{AL_2020_59_3_a0,
     title = {Yurii {Leonidovich} {Ershov} (on his 80th birthday)},
     journal = {Algebra i logika},
     pages = {I--V},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2020_59_3_a0/}
}