CLIFFORD, P.; ANDERSON, A. Red clover seed production - research and practice. NZGA: Research and Practice Series, [S. l.], v. 1, p. 76–79, 1980. DOI: 10.33584/rps.1.1979.3273. Disponível em: https://www.nzgajournal.org.nz/index.php/rps/article/view/3273. Acesso em: 2 may. 2026.