TY - JOUR AU - D. V. Solomatin TI - Researches of semigroups with planar Cayley graphs: results and problems JO - Prikladnaâ diskretnaâ matematika PY - 2021 SP - 5 EP - 57 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PDM_2021_4_a0/ LA - ru ID - PDM_2021_4_a0 ER -