References
- Gad A. The Duodenum. Papers presented at the Fifth Annual Meeting of the International Duodenal Club. Scand J Gastroenterol 1979; 14(Suppl 54)1–120
- Bertaccini G, Cheli R, Dobrilla G, Gad A, Giacosa A. The Duodenum, selected topics. Cortina International, Verona, Raven Press, New York 1988