@article{DAN_1978_242_3_a1,
     author = {E. G. Belaga},
     title = {An analysis of protoschemes of algorithms},
     journal = {Doklady Akademii Nauk},
     pages = {509--512},
     year = {1978},
     volume = {242},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_242_3_a1/}
}