@article {2178,
	title = {The computational complexity of tissue P systems with evolutional symport/antiport rules},
	journal = {Complexity},
	volume = {2018},
	year = {2018},
	month = {04/2018},
	publisher = {Hindawi},
	doi = {https://doi.org/10.1155/2018/3745210},
	author = {Linqiang Pan and Bosheng Song and Luis Valencia-Cabrera and Mario J. P{\'e}rez-Jim{\'e}nez}
}
