Velev, V. ., A. . Popov, L. . Veleva, and N. . Todorov. “THERMAL RESISTANCE OF POLYETHYLENE TEREPHTHALATE FIBRES: THERMAL RESISTANCE OF POLYETHYLENE TEREPHTHALATE FIBRES”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH, vol. 5, no. 1, Mar. 2023, pp. 162-7, doi:10.46687/jsar.v5i1.125.