@article{DBLP:journals/scp/MullerPL06,
author = {Peter M{\"u}ller and
Arnd Poetzsch-Heffter and
Gary T. Leavens},
title = {Modular invariants for layered object structures},
journal = {Sci. Comput. Program.},
volume = {62},
number = {3},
year = {2006},
pages = {253-286},
ee = {http://dx.doi.org/10.1016/j.scico.2006.03.001},
bibsource = {DBLP, http://dblp.uni-trier.de}
}