Aguiar, P.A.A. et al. 2014. Bulb vernalization in onion seed production at submédio São Francisco region. Pesquisa Agropecuaria Brasileira. 18, 7 (Apr. 2014), 741–746. DOI:https://doi.org/10.1590/S1678-3921.pab1983.v18.15351.