@article{10_1017_S0017089500002706,
     author = {McCallum, W. A.},
     title = {The {Higher} homotopy groups of the p-spun trefoil knot},
     journal = {Glasgow mathematical journal},
     pages = {44--46},
     year = {1976},
     volume = {17},
     number = {1},
     doi = {10.1017/S0017089500002706},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002706/}
}