Zisopol, D. G., M. Minescu, and D. V. Iacob. “A Study on the Influence of Aging of the Butt-Welded PE100 SDR11 on Shore A Hardness and Tensile Strength”. Engineering, Technology & Applied Science Research, vol. 14, no. 1, Feb. 2024, pp. 12722-7, doi:10.48084/etasr.6635.