Karapetyan, N. H., et al. “DEPENDENCE OF THE BEANDNA TERMODINAMIC PARAMETERS FROM THE $^{137}$Cs AND $^{40}$K CONTENTS”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 40, no. 2 (210), May 2006, pp. 97-104, doi:10.46991/PYSU:A/2006.40.2.097.