Burroughs KE, Chambliss ML. Antibiotics and Oral Contraceptive Failure. Archives of Family Medicine 2000; 9: 81–82.
Helms SE, Bredle DL, Zajic J, Jarjoura D, Brodell RT, Krishnarao I. Oral contraceptive failure rates and oral antibiotics. Journal of the American Academy of Dermatology 1997; 36: 705–710.