1. D. A. Frank-Kamenetskii, Zh. Fiz. Khim. 13, 738 (1939).
2. D. A. Frank-Kamenetskii, Diffusion and Heat Transfer in Chemical Kinetics (Nauka, Moscow, 1987) [in Russian].
3. J. R. Parks, J. Chem. Phys. 34, 46 (1961).
4. S. I. Khudyaev, Threshold Phenomena in Nonlinear Equations (Fizmatlit, Moscow, 2003) [in Russian].
5. T. Boddington, P. Gray, and D. I. Harvey, Philos. Trans. R. Soc. A: Math., Phys. Eng. Sci. 270(1207), 467 (1971).