Korobiichuk, Valentyn, Volodymyr Shlapak, Ruslan Sobolevskyi, Oleksandr Sydorov, and Liubov Shaidetska. 2019. “Change in the physical­mechanical and Decorative Properties of Labradorite under Thermal Exposure”. Eastern-European Journal of Enterprise Technologies 1 (12 (97):14-20. https://doi.org/10.15587/1729-4061.2019.157307.