Stadnyk В, Romanyuk М, Brezvin Р. A New LiNH4SO4 Crystal with an Isotropic Point. Ukr. J. Phys. [Internet]. 2012 Dec. 15 [cited 2024 Nov. 24];57(12):1231. Available from: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2021129