@article{MM2_1995__88_1_156142,
     author = {David Blanc},
     title = {Homotopy operations and the obstructions to being an {H-space.}},
     journal = {Manuscripta mathematica},
     pages = {497--516},
     year = {1995},
     volume = {88},
     number = {1},
     zbl = {0851.55014},
     url = {http://geodesic.mathdoc.fr/item/MM2_1995__88_1_156142/}
}