@ARTICLE{DasPau_j2001, author = {J{\"u}rgen~Dassow and Gheorghe~P\u{a}un}, title = {{P} systems with communication based on concentration}, journal = actacybern, year = 2001, volume = 15, number = 1, pages = {9--23}, url = {http://www.inf.u-szeged.hu/actacybernetica/vol15n1/cikk2.xml} }