Thierry Boy de la Tour Mnacho Echenim Paliath Narendran Unification and Matching Modulo Leaf-Permutative Equational Presentations. 332-347 2008 IJCAR http://dx.doi.org/10.1007/978-3-540-71070-7_30 conf/cade/2008 db/conf/cade/ijcar2008.html#TourEN08