@Article{Numberlink_JIP,
AUTHOR = {Aaron B. Adcock and Erik D. Demaine and Martin L. Demaine and Michael P. O'Brien and Felix Reidl and Fernando {Sanchez Villaamil} and Blair D. Sullivan},
TITLE = {Zig-Zag {Numberlink} is {NP}-Complete},
JOURNAL = {Journal of Information Processing},
journalurl = {http://www.ipsj.or.jp/english/jip/},
VOLUME = 23,
NUMBER = 3,
PAGES = {239--245},
YEAR = 2015,
withstudent = 1,
doi = {https://dx.doi.org/10.2197/ipsjjip.23.239},
dblp = {https://dblp.org/rec/journals/jip/AdcockDDORVS15},
comments = {This paper is also available as
<A HREF="http://arxiv.org/abs/1410.5845">
arXiv:1410.5845</A> of the
<A HREF="http://arXiv.org/archive/cs/intro.html">
Computing Research Repository (CoRR)</A>. <P>
This paper is also available from <A HREF="http://dx.doi.org/10.2197/ipsjjip.23.239">J-STAGE</A>.},
}
This paper is also available from J-STAGE.