@article{DAN_1990_313_1_a2,
     author = {V. V. Petrov and V. M. Ageev},
     title = {On the choice of regularizing functionals, and optimal time},
     journal = {Doklady Akademii Nauk},
     pages = {18--20},
     publisher = {mathdoc},
     volume = {313},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_313_1_a2/}
}