Rivera Otero, José Manuel, et al. “The Coverage Services Index (CSI) As Management Tool: The Use in the Construction Process of Balanced Scorecard”. Cuadernos de Gobierno Y Administración Pública, vol. 2, no. 1, June 2015, pp. 9-27, https://doi.org/10.5209/rev_CGAP.2015.v2.n1.49427.