Callorda Fossati, Ela, Florence Degavre, y Marthe Nyssens. 2017. «How to Deal With an “essentially Contested Concept” on the Field? Sampling Social Innovations through the Delphi Method». European Public & Social Innovation Review 2 (1). España:45-58. https://epsir.net/index.php/epsir/article/view/56.