@article{TIMM_2017_23_4_a18,
     author = {E. A. Konoval'chik and K. V. Kostousov},
     title = {Symmetrical $2$-extensions of the $2$-dimensional grid. {II}},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {192--211},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2017_23_4_a18/}
}