@article{DAN_1981_257_5_a8,
     author = {V. A. Plaksin},
     title = {Representation of numbers as a sum of four squares of integers, two of which are prime},
     journal = {Doklady Akademii Nauk},
     pages = {1064--1066},
     publisher = {mathdoc},
     volume = {257},
     number = {5},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_257_5_a8/}
}