C. Guigon y J.-F. Pradeau, «Eric. D. Perl, Plotinus. Ennead V, 1: On the Three Primary Levels of Reality. The Enneads of Plotinus with philosophical commentaries. Las Vegas, Zurich, Athènes, Parmenides publishing, 2015, 1 vol. 12,5x19, 228 pp., ISBN 978-1-930972-91-9 ; -92-6.», Exclass, vol. 21, nov. 2017.