by Popov, A. D., Chukreeva, E. I., Flyagin, V. G., Gaeva, R. T., Salganik, M. D., Makarychev, A. R., Chugunnikov, G. G., Ivanova, M. P.
Published in Refractories and industrial ceramics (01.11.1970)

by Jonathan Bor, M. William Salganik and Frank D. Roylance
Published in Knight Ridder Tribune Business News (10.03.2006)

by JONATHAN BOR, M. WILLIAM SALGANIK AND FRANK D. ROYLANCE
Published in The Sun (Baltimore, Md. : 1837) (10.03.2006)