A. C. A. Tannuri, J. A. P. Batatinha, M. C. P. Velhote, and U. Tannuri, “Conjoined twins: twenty years’ experience at a reference center in Brazil”, Clinics, vol. 68, no. 3, pp. 371–377, Jan. 2013, doi: 10.1590/clin.v68i3.72136.