POPOK, N., and A. BALYSH. “NON-WELDED SEALED FITTINGS FOR SMALL DIAMETER PIPELINES AND TUBING”. Vestnik of Polotsk State University. Part B. Industry. Applied Sciences, no. 2, Aug. 2024, pp. 8-13, doi:10.52928/2070-1616-2024-50-2-8-13.