@article {2348, title = { Computational complexity theory in Membrane Computing: Seventeen years after}, journal = {20th International Conference on Membrane Computing, CMC20}, year = {2019}, pages = {191-206}, isbn = {978-606-8493-76-3,}, url = {http://www.cs.us.es/~marper/investigacion/computational-complexity.pdf}, author = {Mario J. P{\'e}rez-Jim{\'e}nez} }