1. Sidorov A. F. and Yanenko N. N., “On the question about unsteady plane polytropic gas flows with rectangular characteristics,” Dokl. Akad. Nauk SSSR, vol. 123, no. 5, 832–834 (1958).
2. Ermolin E. V., Rubina L. I., and Sidorov A. F., “On the problem of two pistons,” J. Appl. Math. Mech., vol. 32, no. 5, 967–976 (1968).
3. Rubina L. I. and Ulyanov O. N., “A geometric method for solving nonlinear partial differential equations,” Trudy Inst. Mat. i Mekh. UrO RAN, vol. 16, no. 2, 130–145 (2010).
4. Rubina L. I. and Ulyanov O. N., “Towards the differences in behavior of solutions of linear and nonlinear heat-conduction equations,” Vestnik Yuzhno-Uralsk. Gos. Univ. Ser. Mat., Mech., Fiz., vol. 5, no. 2, 52–59 (2013).
5. Rubina L. I. and Ulyanov O. N., “On solving certain nonlinear acoustics problems,” Acoust. Phys., vol. 61, no. 5, 527–533 (2015).