Kobyakova, N. K.; Chervyakova, G. N.; Sivenkov, E. A.; Fomin, V. A.; Kurskii, Yu. A.; Lebedev, V. P. Russian Journal of Applied Chemistry, 1993 , vol. 66, # 6.1 p. 1058 - 1062 Zhurnal Prikladnoi Khimii (Sankt-Peterburg, Russian Federation), 1993 , vol. 66, # 6 p. 1313 - 1318