@article{10_4153_CJM_1988_022_5,
     author = {Ringseth, Paul F.},
     title = {On the {Analytic} {Continuation} of {c-Functions}},
     journal = {Canadian journal of mathematics},
     pages = {513--531},
     year = {1988},
     volume = {40},
     number = {3},
     doi = {10.4153/CJM-1988-022-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1988-022-5/}
}