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3. Die invagination als post-operative komplikation;Hunsperger;Beitr Klin Chir,1952
4. Intussusception after Meckel's diverticulectomy. A case report;MacVane;J Maine Med Assoc,1960
5. Intussusception complicating appendectomy. A case report;O'Brien;Can J Surg,1966