1. G. Bluman and S. Kumei, “On the remarkable nonlinear diffusion equation,” J. Math. Phys., 21, No. 5, 1019–1023 (1980).
2. A. Friedman, Partial Differential Equations of Parabolic Type, Prentice-Hall, Englewood Cliffs, New Jersey (1964).
3. S. V. Khabirov, Bäcklund problem for second-order evolutionary equations, preprint, Ufa (1986).
4. L. A. Kozdoba, Methods of Solutions of Nonlinear Heat Transfer Problems, Nauka, Moscow (1975).
5. A. V. Lykov, “Methods of solution of nonlinear nonstationary heat transfer equation,” Izv. Akad. Nauk SSSR. Energ. Transport., No. 5, 109–184 (1970).