@article{10_4153_CJM_2016_030_7,
     author = {Abe, Tetsuya and Tagami, Keiji},
     title = {Characterization of {Positive} {Links} and the s-invariant for {Links}},
     journal = {Canadian journal of mathematics},
     pages = {1201--1218},
     year = {2017},
     volume = {69},
     number = {6},
     doi = {10.4153/CJM-2016-030-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2016-030-7/}
}