KUMAR PATEL, V.; GAHARWAR, A.; S BATRA, R.; PATEL, U. Perforated Retroperitoneal Appendicitis Presenting as Extensive Subcutaneous Emphysema of Abdominal and Chest Wall: An Unusual Presentation. International Journal of Medical Research and Review, v. 2, n. 5, p. 511-514, 31 Oct. 2014.