(en) Anne J. Woodward, Bruce M. Findlay et Susan M. Moore, « Peak and mystical experiences in intimate relationships », Journal of Social and Personal Relationships, vol. 26, no 4, , p. 429–442 (ISSN0265-4075, DOI10.1177/0265407509339994, lire en ligne, consulté le )
Matthew G. McDonald, Stephen Wearing et Jess Ponting, « The Nature of Peak Experience in Wilderness », The Humanistic Psychologist, vol. 37, no 4, , p. 370–385 (ISSN0887-3267, DOI10.1080/08873260701828912, lire en ligne, consulté le )
(en) Anne J. Woodward, Bruce M. Findlay et Susan M. Moore, « Peak and mystical experiences in intimate relationships », Journal of Social and Personal Relationships, vol. 26, no 4, , p. 429–442 (ISSN0265-4075, DOI10.1177/0265407509339994, lire en ligne, consulté le )
Matthew G. McDonald, Stephen Wearing et Jess Ponting, « The Nature of Peak Experience in Wilderness », The Humanistic Psychologist, vol. 37, no 4, , p. 370–385 (ISSN0887-3267, DOI10.1080/08873260701828912, lire en ligne, consulté le )
(en) Anne J. Woodward, Bruce M. Findlay et Susan M. Moore, « Peak and mystical experiences in intimate relationships », Journal of Social and Personal Relationships, vol. 26, no 4, , p. 429–442 (ISSN0265-4075, DOI10.1177/0265407509339994, lire en ligne, consulté le )
Matthew G. McDonald, Stephen Wearing et Jess Ponting, « The Nature of Peak Experience in Wilderness », The Humanistic Psychologist, vol. 37, no 4, , p. 370–385 (ISSN0887-3267, DOI10.1080/08873260701828912, lire en ligne, consulté le )
(en) Mark E. Koltko-Rivera, « Rediscovering the later version of Maslow’s hierarchy of needs: Self-transcendence and opportunities for theory, research, and unification. », Review of General Psychology, no 10, , p. 302-317 (lire en ligne).