@article{JCEM_2020_7_2_a4,
     author = {N. A. Panchenko and A. K. Bogushov},
     title = {Integral method for determining the key value item group},
     journal = {Journal of computational and engineering mathematics},
     pages = {50--57},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JCEM_2020_7_2_a4/}
}