@article{JRAM_1992__432_153463,
     author = {S. Halperin and Y. Felix and J.-C. Thomas},
     title = {Torsion in loop space homology.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {77--92},
     year = {1992},
     volume = {432},
     zbl = {0749.55003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1992__432_153463/}
}