@article{10_37236_5494,
     author = {Tsai-Lien Wong and Xuding Zhu},
     title = {Permanent index of matrices associated with graphs},
     journal = {The electronic journal of combinatorics},
     year = {2017},
     volume = {24},
     number = {1},
     doi = {10.37236/5494},
     zbl = {1355.05121},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/5494/}
}