@article{10_4153_CMB_1990_035_6,
     author = {Oprea, John},
     title = {A {Homotopical} {Conner-Raymond} {Theorem} and a {Question} of {Gottlieb}},
     journal = {Canadian mathematical bulletin},
     pages = {219--229},
     year = {1990},
     volume = {33},
     number = {2},
     doi = {10.4153/CMB-1990-035-6},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1990-035-6/}
}