Zdenek Ryjácek, Gerhard J. Woeginger, Liming Xiong. Hamiltonian index is NP-complete. Discrete Applied Mathematics, 159(4):246-250, 2011. [doi]
@article{RyjacekWX11,
title = {Hamiltonian index is NP-complete},
author = {Zdenek Ryjácek and Gerhard J. Woeginger and Liming Xiong},
year = {2011},
doi = {10.1016/j.dam.2010.08.027},
url = {http://dx.doi.org/10.1016/j.dam.2010.08.027},
tags = {completeness},
researchr = {https://researchr.org/publication/RyjacekWX11},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {159},
number = {4},
pages = {246-250},
}