A hybrid approach to sustainable development competencies: the role of formal, informal and non-formal learning experiences - Caldana, Adriana Cristina Ferreira; Eustachio, João Henrique Paulino Pires; Sampaio, Bárbara Lespinasse; Gianotto, Maria Luiza; Talarico, Aurora Contiero; Batalhão, André Cavalcante da Silva (International Journal of Sustainability in Higher Education, 2021)