@article {1950,
	title = {Polarizationless P Systems with Active Membranes: Computational Complexity Aspects},
	journal = {Journal of Automata, Languages and Combinatorics},
	volume = {21},
	year = {2016},
	pages = {107{\textendash}123},
	issn = {1430-189X},
	author = {Luis Valencia-Cabrera and David Orellana-Mart{\'\i}n and Miguel A. Mart{\'\i}nez-del-Amor and Agust{\'\i}n Riscos-N{\'u}{\~n}ez and Mario J. P{\'e}rez-Jim{\'e}nez}
}
