M. Nazhipkyzy, S. Otarova, B. Lesbayev, N. Prikhodko, A. Zhaparova, and Z. Mansurov, “Study of the effect of an electric field and catalysts on hydrophobic properties of soot formed in propane – air flame”, Chemical Bulletin of Kazakh National University, vol. 76, no. 4, pp. 29-35, Dec. 2014.