ACOUSTIC PROPERTIES OF TRIGLYCINE SULPHATE CRYSTALS WITH α-ALANINE IMPURITY. - Arzikulov, E. U.; Salaxitdinov, F. A.; Yujin, Wang; Lu, Shaowei; Liu, Teng; Nong, Zhisheng; Toshboyev, M. D.; Gulyamov, G. G.; Mamatkulov, N. (East European Journal of Physics, 2026)