de Medeiros, Antônio Roberto Marchese, and Antonio Augusto Lucchesi. “Allelopathic Effects of Common Vetch (Vicia Sativa L.) on Lettuce in Laboratory Tests”. Pesquisa Agropecuaria Brasileira, vol. 28, no. 1, Jan. 1993, pp. 9-14, https://doi.org/10.1590/S1678-3921.pab1993.v28.3855.