Elfberg B.- Åke, Nilsson F., and Selking Örjan. “Parietal Cell Vagotomy and Truncal Vagotomy in Elective Duodenal Ulcer Surgery—Results After Six to Twelve Years”. Upsala Journal of Medical Sciences, vol. 94, no. 2, Sept. 1989, pp. 129-36, doi:10.3109/03009738909178558.