(1)
Dicks, W. Erratum: W.5. Jassim, On the intersection of finitely generated subgroups of free groups, Rey. Mat. Univ. Compl.9 (1996), 67-84. Rev. mat. complut. 1998, 11 ,2, 263. https://doi.org/10.5209/rev_REMA.1998.v11.n2.17238.