Francisco José Romero-Campero Jamie Twycross Miguel Cámara Malcolm Bennett Marian Gheorghe Natalio Krasnogor Modular Assembly of Cell Systems Biology Models Using P Systems. 427-442 2009 20 Int. J. Found. Comput. Sci. 3 http://dx.doi.org/10.1142/S0129054109006668 db/journals/ijfcs/ijfcs20.html#Romero-CamperoTCBGK09