@article{10_1017_S0017089500002056,
     author = {Riley, Robert},
     title = {Hecke invariants of knot groups},
     journal = {Glasgow mathematical journal},
     pages = {17--26},
     year = {1974},
     volume = {15},
     number = {1},
     doi = {10.1017/S0017089500002056},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002056/}
}