Rennee Lockwood, 'Religiosity Rejected: Exploring the Religio-Spiritual Dimensions of Landmark Education', International Journal For the Study of New Religions 2.2 (2011) p.225–254, op p.227: "Landmark Education today insists that the Landmark Forum is entirely distinct from est, claiming that it is not based on or a derivation of Werner Erhard’s original program."
Der Werner-Erhard-Kult: "Erhard Seminar Training", EST, The Centers Network, Forum, Landmark und das Hunger-Projekt. Münchner Rundschau 28.10.1983 (de).