Segocio, D. J. D., C. D. Dayanghirang, and J. E. Cachuela. “A 15-Year Occult Foreign Body in the Subglottic Area of A 50-Year-Old Woman”. Philippine Journal of Otolaryngology Head and Neck Surgery, vol. 31, no. 2, Nov. 2016, pp. 47-50, doi:10.32412/pjohns.v31i2.239.