K. A. Figueroa-Rodríguez, B. Figueroa-Sandoval, M. Borja-Bravo, O. M. Carrillo-Hidalgo, F. Hernández-Rosas, and L. E. Tobón-Olguín, “Trust and social networks of vegetable producers in San Luis Potosí, México”, ASYD, vol. 9, no. 4, pp. 441–453, Dec. 2012.