1. Diseases of the external ear;Wright,1997
2. Developmental anatomy of the ear;Williams,1994
3. Polyotia—a rare external ear anomaly;Ku;Int. J. Pediatr. Otorhinolaryngol.,1998
4. Über eine fall von polyotie;von Bol;Acta Otolaryngol.,1918
5. True polyotia, a rare anomaly of early foetal development;Blas;HNO,1976