1. Textbook of Paediatrics, 3rd ed;Forfar,1984
2. Vaughan, V, C, III, McKay, R, J, Jr, Behrman, R, E, Nelson Textbook Paediatrics, 11th ed. Philadelphia, W.B. Saunders Company, 1979, 2088, 2089
3. Rubin, E, Farber, J, L, Pathology, Philadelphia, J.B. Lippincott Company, 1988, 1445
4. Treatment options and prognosis for multicentric juvenille pilocytic astrocytoma;Mamelak;J Neurosurg,1994
5. Spinal metastasis of pilocytic astrocytoma of the chiasma opticum;Kocks;Childs Nerv Syst,1989