@article {2189,
	title = {P systems with symport/antiport rules: When do the surroundings matter?},
	journal = {Theoretical Computer Science},
	volume = {805},
	year = {2020},
	pages = {206-217},
	doi = {https://doi.org/10.1016/j.tcs.2018.04.052},
	author = {David Orellana-Mart{\'\i}n and Miguel A. Mart{\'\i}nez-del-Amor and Luis Valencia-Cabrera and Bosheng Song and Linqiang Pan and Mario J. P{\'e}rez-Jim{\'e}nez}
}
