Lang, U. M. (1997). "Nicetas Choniates, a Neglected Witness to the Greek Text of John Philoponus' Arbiter". The Journal of Theological Studies. 48 (2): 540–548. doi:10.1093/jts/48.2.540. ISSN0022-5185.
Lang, U. M. (1997). "Nicetas Choniates, a Neglected Witness to the Greek Text of John Philoponus' Arbiter". The Journal of Theological Studies. 48 (2): 540–548. doi:10.1093/jts/48.2.540. ISSN0022-5185.