Barbieri, A.P.P., Espíndola, M.C.G., Menezes, N.L. de and Henrique, D.F.S. 2013. Lettuce seeds treated with cerium and lanthanum aqueous solutions. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]. 43, 1 (Apr. 2013), 104–109.