BAHÇECITAPAR, M.; KARADAG, Özge .; AKTAS, S. Specification of Variance-Covariance Structure in Bivariate Mixed Model for Unequally Time-Spaced Longitudinal Data. International Journal of Statistics in Medical Research, [S. l.], v. 4, n. 4, p. 370–377, 2015. DOI: 10.6000/1929-6029.2015.04.04.6. Disponível em: http://lifescienceglobalca.com/index.php/ijsmr/article/view/3295. Acesso em: 11 jan. 2025.