Swagemakers, Paul, M. Dolores Domínguez García, Xavier Simón Fernández, and Johannes S. C. Wiskerke. “Unfolding Farm Practices: Working Toward Sustainable Food Production in the Netherlands and Spain”. Journal of Agriculture, Food Systems, and Community Development 2, no. 2 (February 7, 2012): 129-145. Accessed December 15, 2019. https://foodsystemsjournal.org/index.php/fsj/article/view/92.