@article{DAN_1981_258_1_a7,
     author = {A. A. Shananin},
     title = {Production functions and profit functions},
     journal = {Doklady Akademii Nauk},
     pages = {38--41},
     year = {1981},
     volume = {258},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_258_1_a7/}
}