TY - JOUR AU - Guo Wenbin AU - A. A. Makhnev AU - D. V. Paduchikh TI - Automorphisms of Coverings of Strongly Regular Graphs with Parameters (81,20,1,6) JO - Matematičeskie zametki PY - 2009 SP - 22 EP - 36 VL - 86 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2009_86_1_a2/ LA - ru ID - MZM_2009_86_1_a2 ER -