PHAM, K.; VOGT, C.; ANDERECK, K. Spiritual Tourism: Travel to Experience Vortex Energy. Journal On Tourism & Sustainability, [S. l.], v. 3, n. 1, p. 32–48, 2019. Disponível em: https://ontourism.academy/journal/index.php/jots/article/view/63. Acesso em: 15 aug. 2022.