Buttafuoco, Gabriele, Annamaria Castrignanò, Antonio Salvatore Colecchia, and Nicola Ricca. 2010. “Delineation of Management Zones Using Soil Properties and a Multivariate Geostatistical Approach”. Italian Journal of Agronomy 5 (4), 323-32. https://doi.org/10.4081/ija.2010.323.