Reva, Olga V., et al. “Dependence of Fire Proof Efficiency of Nonwoven Polyester Material from the Chemical Nature of Nitrogen and Phosphorus-Containing Flame Retardant”. Journal of the Belarusian State University. Chemistry, no. 2, Dec. 2017, pp. 85-93, https://journals.bsu.by/index.php/chemistry/article/view/1171.