@ARTICLE{LohreyZetzsche2017b,
	AUTHOR		= {Lohrey, Markus and Zetzsche, Georg},
	TITLE		= {Knapsack in Graph Groups},
	YEAR		= {2018},
	NOTE		= {Combines papers at STACS 2016 {\&} 2017},
	JOURNAL		= {Theory of Computing Systems},
	VOLUME		= {62},
	PAGES		= {192--246},
	DOI		= {10.1007/s00224-017-9808-3}
}