Reference
- MacMahon B., Pugh T. Epidemiology. Little, Brown and Co., Boston 1980
- Sørensen C. H., Holm-Jensen S., Tos M. The post-winter prevalence rate of middle ear effusion in four-year-old children, judged by tympanometry. Int J Ped Otorhinolaryng 1981a; 3: 119
- Sørensen C. H., Holm-Jensen S., Tos M. Middle ear effusion and Risk Factors. J Otolaryngol Toronto 1981b, In print
- Tos M., Poulsen G. Tympanometry in two-year-old children. ORL 1979; 41: 1
- Tos M., Poulsen G., Borch J. Tympanometry in two-year-old children. Changes of tympanograms at the reevalution. ORL 1978; 40: 206
- Tos M., Poulsen G., Borch J. Etiological factors in secretory otitis. Arch Otolaryng 1979; 105: 582