I found another source, this time a scholarly journal, that refers to Matrixism. On page 105 of Nova Religio: The Journal of Alternative and Emergent Religions, Volume 10, Issue 4, ISSN 1092-6690 (print), 1541-8480 (electronic), Copyright 2007 by The Regents of the University of California, Matrixism and its website's URL are listed among eight other esoteric new religions in an article titled "Perspective New New Religions: Revisiting a Concept" by J. Gordon Melton.

Again I am not sure how to style this citation consistent with Wikipedia standards.