@article{CMH_1983__58_139951,
     author = {Slawomir Kwasik},
     title = {Wall's obstructions and {Whitehead} torsion.},
     journal = {Commentarii mathematici Helvetici},
     pages = {503--508},
     publisher = {mathdoc},
     volume = {58},
     year = {1983},
     zbl = {0537.57010},
     url = {http://geodesic.mathdoc.fr/item/CMH_1983__58_139951/}
}