ETTALA, E. Boars for breeding: A study of methods of evaluation used at testing stations. Agricultural and Food Science, [S. l.], v. 45, n. 1, p. 17–119, 1973. DOI: 10.23986/afsci.72938. Disponível em: https://journal.fi/afs/article/view/72938. Acesso em: 31 jul. 2021.