@article{CMH_1990__65_3_140195,
     author = {Reinhard Schultz and S. Kwasik},
     title = {Positive scalar curvature and periodic fundamental groups.},
     journal = {Commentarii mathematici Helvetici},
     pages = {271--286},
     publisher = {mathdoc},
     volume = {65},
     number = {3},
     year = {1990},
     zbl = {0717.53026},
     url = {http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140195/}
}