@article{CMH_1972__47_139501,
     author = {Ren\'e P. Held and Denis Sjerve},
     title = {On the {Spanier} {Conjecture}},
     journal = {Commentarii mathematici Helvetici},
     pages = {75--91},
     publisher = {mathdoc},
     volume = {47},
     year = {1972},
     zbl = {0233.55009},
     url = {http://geodesic.mathdoc.fr/item/CMH_1972__47_139501/}
}