CABALLERO, R. C.R.W., Spedding, 1975: The biology of Agricultural Systems. Academic Press., 261 páginas. Pastos, [S. l.], v. 7, n. 1, p. 165–166, 2011. Disponível em: https://polired.upm.es/index.php/pastos/article/view/650. Acesso em: 26 apr. 2026.