Pita Castro, J. C. “Social Gravities and Artistic Training Paths: The Artistic Vocation Viewed through the Prism of the Concept of Temporal Form of Causality”. European Journal for Research on the Education and Learning of Adults, vol. 6, no. 2, Oct. 2015, pp. 191-09, doi:10.3384/rela.2000-7426.rela0146.