@article{UFA_2020_12_4_a8,
     author = {V. N. Ushakov and A. A. Ershov},
     title = {On recovering of unknown constant parameter by several test controls},
     journal = {Ufa mathematical journal},
     pages = {99--113},
     publisher = {mathdoc},
     volume = {12},
     number = {4},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2020_12_4_a8/}
}