@misc{MM_2020_32_10_a9,
     title = {Nikolai {Nikolaevich} {Kalitkin} (on his 85th birthday)},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {135--136},
     publisher = {mathdoc},
     volume = {32},
     number = {10},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_2020_32_10_a9/}
}