Cruz-Huicochea, R. and S.P. Verma. “New critical values for F and their use in the ANOVA and Fisher’s F tests for evaluating geochemical reference material granite G-2 (U.S.A.) and igneous rocks from the Eastern Alkaline Province (Mexico)”. Journal of Iberian Geology, vol. 39, vol. 39, no. 1, 2013, pp. 13-30, doi: https://doi.org/10.5209/rev_JIGE.2013.v39.n1.41746.