@article{CMH_1969__44_139400,
     author = {Francois Sigrist and Roy R. Douglas},
     title = {Homotopy-associative {H-spaces} which are {Sphere} {Bundles} over {Spheres.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {308--309},
     publisher = {mathdoc},
     volume = {44},
     year = {1969},
     zbl = {0176.21201},
     url = {http://geodesic.mathdoc.fr/item/CMH_1969__44_139400/}
}