@article{DAN_1991_316_6_a1,
     author = {V. D. Didenko},
     title = {Para-algebras and approximate solution of singular},
     journal = {Doklady Akademii Nauk},
     pages = {1293--1297},
     publisher = {mathdoc},
     volume = {316},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_316_6_a1/}
}