Ziwen Liu, Chao Yang 0003. Hanano Puzzle is NP-hard. Inf. Process. Lett., 145:6-10, 2019. [doi]
@article{LiuY19-3, title = {Hanano Puzzle is NP-hard}, author = {Ziwen Liu and Chao Yang 0003}, year = {2019}, doi = {10.1016/j.ipl.2019.01.003}, url = {https://doi.org/10.1016/j.ipl.2019.01.003}, researchr = {https://researchr.org/publication/LiuY19-3}, cites = {0}, citedby = {0}, journal = {Inf. Process. Lett.}, volume = {145}, pages = {6-10}, }