@ARTICLE{DasPau_j1999_b, author = {J{\"u}rgen~Dassow and Gheorghe~P\u{a}un}, title = {On the power of membrane computing}, journal = jucs, year = 1999, volume = 5, number = 2, pages = {33--49}, url = {http://www.jucs.org/jucs_5_2/on_the_power_of/Dassow_J.pdf} }