1. 1. Spencer R. Gastrointestinal hemorrhage in infancy and childhood: 476 cases. Surgery 55 (1964) 718-734.
2. 2. Collins. R. E. C Some problems of gastrointestinal bleeding in children. Arch. Dis. Child. 46 (1971). 110-112.
3. 3. Jankelson I. R. ana Mitner L. R. Digestive tract hemorrhage of undetermined origin: Clinical and pathological observations. Rev. Gastroenterol. 15 (1948) 692-695.
4. 4. Sherman N. J. and Clatworthy. H. W. Jr. Gastrointestinal bleeding in neonates: A study of 94 cases. Surgery 62 (1967) 614-619.
5. 5. Stanley-Brown E. G. and Stevenson S. S. Massive gastrointestinal hemorrhage in the newborn infant. Pediatrics 35 (1965) 482-483.