Bitton-Ashkelony, Brouria (2011). "The Limit of the Mind (NOΥΣ): Pure Prayer according to Evagrius Ponticus and Isaac of Nineveh". Zeitschrift für Antikes Christentum / Journal of Ancient Christianity. 15 (2). doi:10.1515/zac.2011.15. ISSN1612-961X.
Brock, S., trans. (1997). The Wisdom of Saint Isaac the Syrian. pp. 5-9. Fairacres Oxford, England: SLG Press, Convent of the Incarnation. ISSN0307-1405.
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Bitton-Ashkelony, Brouria (2011). "The Limit of the Mind (NOΥΣ): Pure Prayer according to Evagrius Ponticus and Isaac of Nineveh". Zeitschrift für Antikes Christentum / Journal of Ancient Christianity. 15 (2). doi:10.1515/zac.2011.15. ISSN1612-961X.