Delgado Alvarado, Gustavo, and Bertram Nagel. 2008. “A Simple Experiment to Evaluate the Uncertainty Following the Guide GUM ISO 1995 and Using MAPLE Symbolic Computation 11.0”. Universitas (León) 2 (1). Nicaragua, NI:19-26. https://doi.org/10.5377/universitas.v2i1.1639.