@article {2103,
	title = {An efficient time-free solution to QSAT problem using P systems with proteins on membranes},
	journal = {Information and Computation},
	volume = {2560},
	year = {2017},
	pages = {287-299},
	doi = {http://dx.doi.org/10.1016/j.ic.2017.06.005},
	author = {Bosheng Song and Mario J. P{\'e}rez-Jim{\'e}nez and Linqiang Pan}
}
