VI. The Etiology of Certain Congenital Tumors of the Groin: Their Relationship to Hernial Sacs. Russell RH. Ann Surg. 1906 May;43(5):717-23. doi: 10.1097/00000658-190605000-00006. PMID: 17861798
THE ETIOLOGY OF CYSTS CONNECTED WITH HERNIAL SACS. Murray RW. Ann Surg. 1916 May;63(5):544-7. doi: 10.1097/00000658-191605000-00007. PMID: 17863536