@article{MZM_1970_7_5_a11,
     author = {V. P. Anosov and P. E. Sobolevskii},
     title = {Functional equations in the theory of semigroups},
     journal = {Matemati\v{c}eskie zametki},
     pages = {635--640},
     publisher = {mathdoc},
     volume = {7},
     number = {5},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1970_7_5_a11/}
}