@article{DAN_1962_146_1_a4,
     author = {L. E. Evtushik},
     title = {On a construction of invariant forms and structural equations of infinite groups},
     journal = {Doklady Akademii Nauk},
     pages = {20--21},
     publisher = {mathdoc},
     volume = {146},
     number = {1},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_146_1_a4/}
}