ČEPEK, A.; VONDRÁK, J. Covariances of Smoothed Observational Data. Acta Polytechnica, [S. l.], v. 40, n. 5, 2000. Disponível em: https://ojst.is.cvut.cz/ojs/index.php/ap/article/view/156.. Acesso em: 27 jun. 2025.