On the structure of connected locally GQ(3, 9)-graphs. - Alexander A. Makhnev; D. V. Paduchikh (Discret. Appl. Math., 2004)

Arc transitive distance regular covers of cliques. - Alexander A. Makhnev; D. V. Paduchikh; Ludmila Yu. Tsiovkina (Electron. Notes Discret. Math., 2013)