@article{10_4153_CJM_1991_042_4,
     author = {Erbe, L. H. and G\k{e}ba, K. and Krawcewicz, W.},
     title = {Equivariant {Fixed} {Point} {Index} and the {Period-Doubling} {Cascades}},
     journal = {Canadian journal of mathematics},
     pages = {738--747},
     year = {1991},
     volume = {43},
     number = {4},
     doi = {10.4153/CJM-1991-042-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1991-042-4/}
}