1. Birt, B. D. (1930): Reticulum Cell Sarcoma of the nose and paranasal sinuses. Journal of Laryngology and otology 84: 615.
2. Chaturvedi, V. N., Razada, R.M., Jain, S.K.T., Haricharan, K. K. and Pakhan, A. J. (1986): A profile of malignant tumours of paranasal sinuses. (Study of 57 cases). Indian Journal of Cancer. 23: 14.
3. Donovan, R., Johansson, S.G.O., Bennich, H. and Scothil, l.P. (1970): Immununoglobulins in nasal polyps. International Archives of Allergy and Applied Immunology. 37: 154.
4. Drake-Lee, A. B. (1987): Scott Brown’s Otolaryngology, Rhinology. Chapter 9. 5th edn. London, Butter-worths. 142–153.
5. Fechner, R. E. (1990): Upper respiratory tract and ear. In Pathology. Vol-2.9th edn. ed. J. M. Kissane. Saint Louis, C. V. Mosby Co.,