On Extended Simple Eco-grammar Systems. - Judit Csima (Acta Cybern., 1998)

On Hybrid Eco-rewriting Systems. - Judit Csima (Grammars, 1999)

Two remarks on variants of simple eco-grammar systems. - Judit Csima (Acta Cybern., 2000)

Power and size of extended Watson-Crick L systems. - Judit Csima; Erzsébet Csuhaj-Varjú; Arto Salomaa (Theor. Comput. Sci., 2003)