المؤلفون: Löppönen, H., Holma, T., Sorri, M., Jyrkinen, L., Karhula, V., Koivula, A., Ilkko, E., Laitinen, J., Koivukangas, J., Oikarinen, J., Alamäki, O.

المصدر: Acta Oto-Laryngologica ; volume 117, issue sup529, page 47-49 ; ISSN 0001-6489 1651-2251

الاتاحة: http://dx.doi.org/10.3109/00016489709124077
http://www.tandfonline.com/doi/pdf/10.3109/00016489709124077