Haase, R. 1999. Seasonal growth of "algodão-bravo" (<i>Ipomoea carnea</i> spp. <i>fistulosa</i>). Pesquisa Agropecuaria Brasileira. 34, 2 (Feb. 1999), 159–163. DOI:https://doi.org/10.1590/S1678-3921.pab1999.v34.5154.