1. Chester, M., Second sound in solids. Phys. Rev., 131, No.5 (1963) 2013–2015
2. Eckert, E.R.G., Drake, R.M., Analysis of Heat and Mass Transfer, McGraw-Hill, New York, 1972
3. Morse, P.M., Freshbach, H., Methods of Theoretical Phys., McGraw-Hill, New York, 1953(esp.p.298)
4. Vujanovic, B., An approach to linear and nonlinear heat transfer problem using a Lagrangian.
5. AIAA Journal, 9, No.1(1971)131–134 {see also: 9, No. 2(1971), 327–330