Teppo, Heikki, Petri Koivunen, Sampsa Sipilä, Kalevi Jokinen, Kalevi Hyrynkangas, Esa Läärä, Eero Pukkala, Ulla Sovio, and Olli-Pekka Alho. 2001. “Decreasing Incidence and Improved Survival of Laryngeal Cancer in Finland”. Acta Oncologica 40 (7):791-95. https://doi.org/10.1080/02841860152703391.