1. Louis DN, Ohgaki H, Wiestler OD, Cavenee WK. WHO Classification of Tumours of the Central Nervous System, Revised. 4th Ed. IARC (Lyon). 2016;408.
2. Zülch KJ. Histological typing of tumours of the central nervous system. World Health Organization (Geneva). 1979.
3. Histological Typing of Tumours of the Central Nervous System
4. Kleihues P, Cavenee WK. (eds.). World Health Organisation classification of tumours: Pathology and genetics of tumours of the nervous system. IARC Press (Lyon). 2000.