Delgado, O., and J. Martínez. “Noise Mapping of the Urban Area of the City of Cuenca - Ecuador, Using the Technique of Ordinary Kriging Geostatistical Interpolation”. Ciencias Espaciales, vol. 8, no. 1, Aug. 2015, pp. 411-40, doi:10.5377/ce.v8i1.2059.