@article{10_4064_ba61_1_8,
     author = {Denise de Mattos and Tha{\'\i}s F. M. Monis and Edivaldo L. dos Santos},
     title = {Relative {Borsuk{\textendash}Ulam} {Theorems} for {Spaces} with a {Free} $\mathbb{Z}_2$-action},
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     pages = {71--77},
     publisher = {mathdoc},
     volume = {61},
     number = {1},
     year = {2013},
     doi = {10.4064/ba61-1-8},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ba61-1-8/}
}