1. Ermolov, I.N. and Lange, Yu.V., Nerazrushayushchii kontrol’. Tom 3. Ul’trazvukovoi kontrol’ (Nondestructive Testing, vol. 3 Ultrasound Testing), Klyuev, V.V., Ed., Moscow: Mashinostroenie, 2004.
2. Lange, Yu.V., Akusticheskie nizkochastotnye metody i sredstva nerazrushayushchego kontrolya mnogosloinykh konstruktsii (Acoustic Low Frequency Methods and Tools for Non-Destructive Control of Multilayer Structures), Moscow Mashinostroenie, 1991.
3. Domarkas, V.I. and Kazhis, R.-I.Yu., Kontrol’no-ozmeritel’nye p’ezoelektricheskie preobrazovateli (Gauging Piezoelectric Transducers), Vilnius Mintis, 1974.
4. Ul’trozvukovye preobrazovateli dlya nerazrushayushchego kontrolya (Ultrasonic Transducers for Nondestructive Testing), Ermolov, I.N., Ed., Moscow Mashinostroenie, 1986.
5. Dianov, D.B., Passing of transient audio signals through a layered media, Izv. Leningr. Elektrotekh. Inst., 1968, no. 63, pp. 87–95.