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Nishiyama A, Watanabe M, Yang Z, Bu J. Identity, distribution, and development of polydendrocytes: NG2-expressing glial cells. J Neurocytol. 2002 Jul-Aug;31(6-7):437-55.

Nishiyama A. NG2 cells in the brain: a novel glial cell population. Hum Cell. 2001 Mar;14(1):77-82.

Nishiyama A, Chang A, Trapp BD. NG2+ glial cells: a novel glial cell population in the adult brain. J Neuropathol Exp Neurol. 1999 Nov;58(11):1113-24.