PINHEIRO, J. C. Conditional versus Marginal Covariance Representation for Linear and Nonlinear Models. Austrian Journal of Statistics, [S. l.], v. 35, n. 1, p. 31–44, 2016. DOI: 10.17713/ajs.v35i1.346. Disponível em: https://www.ajs.or.at/index.php/ajs/article/view/vol35%2C%20no1%20-%203. Acesso em: 8 oct. 2025.