@article{MM_2021_33_2_a9,
     author = {B. N. Chetverushkin and A. I. Aptekarev},
     title = {In memory of {Nikolay} {Nikolaevich} {Kalitkin}},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {141--142},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_2021_33_2_a9/}
}