DICKS, W. Erratum: W.5. Jassim, On the intersection of finitely generated subgroups of free groups, Rey. Mat. Univ. Compl.9 (1996), 67-84. Revista Matemática Complutense, v. 11, n. 2, p. 263, 1 ene.1998 https://doi.org/10.5209/rev_REMA.1998.v11.n2.17238.