1. Abdullaev SS, Zaslavsky GM (1981) Nonlinear dynamics of rays in inhomogeneous media. J Exp Theor Phys 80(2):525–536
2. Babich VM, Buldyrev VS (1991) Asymptotic methods in short-wave diffraction theory. Springer series of wave phenomena, vol 4. Springer, Berlin
3. Borisov AV, Burenin AA, Polenov VS, Chigarev AV (2015) A wave dynamics of inhomogeneous and nonlinear media with application to geomechanics and biomechanics. Universum, Smolensk
4. Chigarev AV (1980) A geometry of wave fronts in inhomogeneous media. Sov Phys Acoust 26(6):905–912
5. Chigarev AV (2000) A stochastic and regular dynamics of inhomogeneous media. Technoprint, Minsk