Córdova-Albán, D., M. Albán-Bautista, and M. Cárdenas-Cárdenas. “Business Service Evaluation: An Approach to the CMMi - Service System”. 593 Digital Publisher CEIT, vol. 6, no. 3, Sept. 2021, pp. 576-84, https://www.593dp.com/index.php/593_Digital_Publisher/article/view/600.