@article{1102724455, author = {Siegberg, H. W. and Skordev, G.}, title = {Fixed point index and chain approximations.}, journal = {Pacific J. Math.}, volume = {103}, number = {2}, year = {1982}, pages = { 455-486}, language = {en}, url = {http://dml.mathdoc.fr/item/1102724455} }
Siegberg, H. W.; Skordev, G. Fixed point index and chain approximations.. Pacific J. Math., Tome 103 (1982) no. 2, pp. 455-486. http://gdmltest.u-ga.fr/item/1102724455/