@article{DBLP:journals/entcs/LopesF02,
author = {Ant{\'o}nia Lopes and
Jos{\'e} Luiz Fiadeiro},
title = {Superposition: Composition vs refinement of non-deterministic
action-based systems},
journal = {Electr. Notes Theor. Comput. Sci.},
volume = {70},
number = {3},
year = {2002},
pages = {282-296},
ee = {http://dx.doi.org/10.1016/S1571-0661(05)82562-9},
bibsource = {DBLP, http://dblp.uni-trier.de}
}