FILHO, Moacyr Bernadino Dias. Physiological responses of two tropical weeds to shade. II. Leaf gas exchange and nitrogen content. Pesquisa Agropecuaria Brasileira, [S. l.], v. 34, n. 6, p. 953–961, 1999. DOI: 10.1590/S1678-3921.pab1999.v34.5276. Disponível em: https://apct.sede.embrapa.br/pab/article/view/5276. Acesso em: 10 dec. 2025.