Yakovlev, Grigory, Jadvyga Keriene, Anastasiia Gordina, Irina Polyanskikh, and Milan Bekmansurov. 2017. “Efficient Eco-Friendly Composite Fluorine Anhydrite-Based Materials”. International Conference “Environmental Engineering” 10 (January): 1-6. https://doi.org/10.3846/enviro.2017.009.