Narayanan, A., S. Sundararaman, L. Varadhan, R. Rajput, N. Reay-Jones, and V. Gupta. “The Value of Microbiological Analysis of Pus Swabs in Perianal Abscess. Have They Stood the Test of Time and Antibiotic Usage?”. International Surgery Journal, vol. 2, no. 2, Dec. 2016, pp. 175-8, https://www.ijsurgery.com/index.php/isj/article/view/521.