OJEDA, P. A. V.; ENCISO GARAY, C. R. Critical period of weed interference in carrot crop. Investigación Agraria, San Lorenzo, PY, v. 19, n. 2, p. 77–85, 2017. DOI: 10.18004/investig.agrar.2017.diciembre.77-85 . Disponível em: https://www.agr.una.py/revista/index.php/ria/article/view/414. Acesso em: 11 nov. 2026.