@article{10_4064_ap_52_3_243_280,
     author = {Grzegorz Dylawerski and Kazimierz G\k{e}ba and Jerzy Jodel and Wac{\l}aw Marzantowicz},
     title = {An $S^1$-equivariant degree and the {Fuller} index},
     journal = {Annales Polonici Mathematici},
     pages = {243--280},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1990},
     doi = {10.4064/ap-52-3-243-280},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-52-3-243-280/}
}