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Acciuffi S, Ghosh S, Ferguson A (1996). "Strengths and limitations of the Crohn's disease activity index, revealed by an objective gut lavage test of gastrointestinal protein loss". Alimentary Pharmacology and Therapeutics. 10 (3): 321–6. doi:10.1111/j.0953-0673.1996.00321.x. PMID8791958.
Irvine E, Feagan B, Rochon J, Archambault A, Fedorak R, Groll A, Kinnear D, Saibil F, McDonald J (1994). "Quality of life: a valid and reliable measure of therapeutic efficacy in the treatment of inflammatory bowel disease. Canadian Crohn's Relapse Prevention Trial Study Group". Gastroenterology. 106 (2): 287–96. doi:10.1016/0016-5085(94)90585-1. PMID8299896.
Best WR, Becktel JM, Singleton JW, Kern F Jr (March 1976). "Development of a Crohn's disease activity index. National Cooperative Crohn's Disease Study". Gastroenterology. 70 (3): 439–444. doi:10.1016/S0016-5085(76)80163-1. PMID1248701.
Acciuffi S, Ghosh S, Ferguson A (1996). "Strengths and limitations of the Crohn's disease activity index, revealed by an objective gut lavage test of gastrointestinal protein loss". Alimentary Pharmacology and Therapeutics. 10 (3): 321–6. doi:10.1111/j.0953-0673.1996.00321.x. PMID8791958.