Roberto Bruni Alberto Lluch-Lafuente Ugo Montanari Hierarchical Design Rewriting with Maude. 45-62 2009 238 Electr. Notes Theor. Comput. Sci. 3 http://dx.doi.org/10.1016/j.entcs.2009.05.012 db/journals/entcs/entcs238.html#BruniLM09