@article {2352, title = {P Systems: From anti-matter to anti-rules}, journal = {Seventeenth Brainstorming Week on Membrane Computing}, year = {2019}, pages = {41-58}, url = {http://www.cs.us.es/~marper/investigacion/antimatter-antirules.pdf}, author = {Artiom Alhazov and Rudolf Freund and Sergey Ivanov and Mario J. P{\'e}rez-Jim{\'e}nez} }