Vílchez Pérez, H.J., Pinell Centeno, W.I. and López Valdivia, F.A. 2015. Operational evaluation of the wastewater treatment system in Esteli, Nicaragua. Journal of Science and Technology El Higo. 5, 1 (Dec. 2015), 42–57. DOI:https://doi.org/10.5377/elhigo.v5i1.8628.