Kroon, David F.; m.fl. (2002). «Surfer's ear: External auditory exostoses are more prevalent in cold water surfers». Otolaryngology–Head and Neck Surgery. 126 (5): 499–504. PMID12075223. doi:10.1067/mhn.2002.124474.
Kroon, David F.; m.fl. (2002). «Surfer's ear: External auditory exostoses are more prevalent in cold water surfers». Otolaryngology–Head and Neck Surgery. 126 (5): 499–504. PMID12075223. doi:10.1067/mhn.2002.124474.