Velandia Pacheco, G., Escobar Castillo, A., García Rodríguez, J., & Riquett Vides, C. (2021). How do highly informal MSMEs determine costs? A cooperative case in the Magdalena’ Department. International Journal of Management Science and Operations Research, 6(1), 11-20. https://doi.org/10.17981/ijmsor.v6i1.118