Kuranovas, Artiomas, and Audronis Kazimieras Kvedaras. “Centrifugally Manufactured Hollow concrete‐filled Steel Tubular Columns”. Journal of Civil Engineering and Management 13, no. 4 (December 31, 2007): 297-306. Accessed July 15, 2020. https://journals.vgtu.lt/index.php/JCEM/article/view/7693.