1. Under the knife;van de Laar,2018
2. Anorectal infection: abscess-fistula;Abcarian;Clin Colon Rectal Surg,2011
3. Corman’s colon and rectal surgery;Corman,2012
4. Corman’s colon and rectal surgery;Corman,2012
5. Cryptoglandular abscess and fistula;Johnson,2022