V. Mеdеnsеv N., et al. “Study of Properties of Flame Retardant Polymer Coatings Based on Vinyl Acetate Copolymers”. EUROPEAN JOURNAL OF INNOVATION IN NONFORMAL EDUCATION, vol. 2, no. 10, Oct. 2022, pp. 1-4, https://inovatus.es/index.php/ejine/article/view/1219.