@article{DAN_1968_179_1_a6,
     author = {V. N. Salii},
     title = {Transformative semigroups $(\mathfrak{G},\circ,\xi,\chi_1,\chi_2)$},
     journal = {Doklady Akademii Nauk},
     pages = {30--33},
     publisher = {mathdoc},
     volume = {179},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_179_1_a6/}
}