Ruiz-Vanoye, J. A., Fuentes-Penna, A., Díaz-Parra, O., Barrera-Cámara, R. A., Lezama-León, M. and Lezama-León, E. (2018) “Editorial for Volume 9 Number 3: Models, Resources and Activities of Project Scheduling Problems”, International Journal of Combinatorial Optimization Problems and Informatics, 9(3), pp. 1-17. Available at: https://ijcopi.org/ojs/article/view/98 (Accessed: 4June2020).