1. Ermolov, I.N. and Lange, Yu.V., Nerazrushayushchii kontrol?. Spravochnik v 7-mi tomakh (Nondestructive Testing. Handbook in 7 Volumes), Klyuev, V.V., Ed., vol. 3: Ultrasonic Testing, Moscow: Mashinostroenie, 2004.
2. Viktorov, I.A., Zvukovye poverkhnostnye volny v tverdykh telakh (Surface Sound Waves in Solids), Moscow: Nauka, 1981.
3. Ermolov, I.N., Razygraev, N.P., and Shcherbinskii, V.G., The Use of Acoustic Head Waves for Ultrasonic Testing, Defektoskopiya, 1978, no. 1, pp. 33?40.
4. Proceedings of 7th European Conference on Nondestructive Testing, Copenhagen, Denmark, 1998, (the presentation numbers are indicated).
5. Yuozonene, L.V., Elastic Surface Longitudinal Waves and Their Application for Nondestructive Testing, Defektoskopiya, 1980, no. 8, pp. 29?38.