@article{bwmeta1.element.bwnjournal-article-fmv134i1p6bwm,
author = {Helga Schirmer},
title = {A fixed point index for bimaps},
journal = {Fundamenta Mathematicae},
volume = {134},
year = {1990},
pages = {93-104},
zbl = {0708.55001},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv134i1p6bwm}
}
Schirmer, Helga. A fixed point index for bimaps. Fundamenta Mathematicae, Tome 134 (1990) pp. 93-104. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv134i1p6bwm/