Akhrem, Irena S.; Avetisyan, Dzhul'Etta V.; Afanas'Eva, Lyudmila V.; Goryunov, Evgenii I.; Churilova, Irina M.; Petrovskii, Pavel V.; Kagramanov, Nikolai D. Mendeleev Communications, 2011 , vol. 21, # 5 p. 259 - 261