Cuzzuol, Geraldo Rogério Faustini, et al. “Nutrient Solutions for Plant Growth and Fructan Production in <i>Vernonia herbacea< I>”;. Pesquisa Agropecuaria Brasileira, vol. 40, no. 9, Sept. 2005, pp. 911-7, doi:10.1590/S1678-3921.pab2005.v40.7044.