D. Puzzolo, A. Micali, A. Pisani, D. Bruschetta, B. Ricciardi, and I. Carella, “Embryological considerations on a case of coexistence of persistent left superior vena cava and partially left inferior vena cava”, Ital J Anat Embryol, vol. 119, no. 1, p. 159, Mar. 2015.