Menna, C., F. Gandolfi, M. Passari, M. Cannellini, G. Trentin, T. Del Giudice, C. Cavallo, and I. Cigliano. “Farm Advisory Services and Knowledge Growth in Italy: Comparison Among Three Regional Intervention Models”. Italian Review of Agricultural Economics, vol. 75, no. 1, June 2020, pp. 61-70, https://oajournals.fupress.net/index.php/rea/article/view/11743.