@article{DBLP:journals/nc/IonescuMPP03,
author = {Mihai Ionescu and
Carlos Mart\'{\i}n-Vide and
Andrei Paun and
Gheorghe P\u{a}un},
title = {Unexpected universality results for three classes of P systems
with symport/antiport},
journal = {Natural Computing},
volume = {2},
number = {4},
year = {2003},
pages = {337-348},
ee = {http://dx.doi.org/10.1023/B:NACO.0000006773.31625.55},
bibsource = {DBLP, http://dblp.uni-trier.de}
}