Weight constraints as nested expressions
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\begin{bibtex} @article{DBLP:journals/tplp/FerrarisL05,
author = {Paolo Ferraris and
Vladimir Lifschitz},
title = {Weight constraints as nested expressions},
journal = {TPLP},
volume = {5},
number = {1-2},
year = {2005},
pages = {45-74},
ee = {http://dx.doi.org/10.1017/S1471068403001923},
bibsource = {DBLP, http://dblp.uni-trier.de}
}
\end{bibtex}
