@article{JRAM_1984__355_152688,
     author = {Hans Delfs},
     title = {The homotopy axiom in semialgebraic cohomology.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {108--128},
     publisher = {mathdoc},
     volume = {355},
     year = {1984},
     zbl = {0543.55004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1984__355_152688/}
}