Ribeiro, Ivana de Campos, Ana Firmino, Maria Albertina Amantes Raposo, Maria Antónia Pacheco Ilhéu, and Silvia Franco. 2018. “Walks in Nature As Exercise of Selfknowledge: Leading to Authentic Happiness”. Revista Hipótese 4 (3): 20-37. https://revistahipotese.editoraiberoamericana.com/revista/article/view/346.