Bleiholder, Hermann, Hanskarl Kirfel, Peter Langeluddeke, and Reinhold Stauss. “A Uniform Code for the Phenological Stages of Crops and Weeds”. Pesquisa Agropecuaria Brasileira 26, no. 9 (September 1, 1991): 1423–1429. Accessed July 6, 2026. https://apct.sede.embrapa.br/pab/article/view/3483.