V. I. Erofeev, V. V. Kazhaev, and I. S. Pavlov, “Inelastic interaction and splitting of strain solitons propagating in a granular medium”, ВМСС, vol. 6, no. 2, pp. 140–150, Jul. 2013, doi: 10.7242/1999-6691/2013.6.2.17.