MAJEED, A’amer Hameed. Gas Holdup in a Bubble Column. Iraqi Journal of Chemical and Petroleum Engineering, Baghdad, Iraq., v. 2, n. 2, p. 1–7, 2001. DOI: 10.31699/IJCPE.2001.2.1. Disponível em: https://www.ijcpe.uobaghdad.edu.iq/index.php/ijcpe/article/view/567. Acesso em: 3 may. 2025.