HERZEL, A.; KUMAR, P. On a class of congruent sample design and their properties. Statistica, [S. l.], v. 50, n. 4, p. 471–482, 1990. DOI: 10.6092/issn.1973-2201/846. Disponível em: https://rivista-statistica.unibo.it/article/view/846. Acesso em: 6 may. 2024.