@article{DAN_1973_210_4_a0,
     author = {J. I. Bogoljubov},
     title = {On the equation $\varphi(z)=\varphi_1(x)+\varphi_2(x)+\varphi_3(x+y)$},
     journal = {Doklady Akademii Nauk},
     pages = {753--755},
     publisher = {mathdoc},
     volume = {210},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_210_4_a0/}
}