@article{IM_1979__53_142658,
     author = {John B. Friedlander and S. Halperin},
     title = {An {Arithmetic} {Characterization} of the {Rational} {Homotopy} {Groups} of {Certain} {Spaces.}},
     journal = {Inventiones mathematicae},
     pages = {117--134},
     publisher = {mathdoc},
     volume = {53},
     year = {1979},
     zbl = {0396.55010},
     url = {http://geodesic.mathdoc.fr/item/IM_1979__53_142658/}
}