Petrini, Juliana, et al. “Degree of Multicollinearity and Variables Involved in Linear Dependence in additive‑dominant Models”. Pesquisa Agropecuaria Brasileira, vol. 47, no. 12, Jan. 2013, pp. 1743-50, doi:10.1590/S1678-3921.pab2012.v47.11889.