@article{MM2_1981__35_154784,
     author = {Ph. R. Heath and G.H. Norton},
     title = {Equiconnectivity and {Cofibrations} {I.}},
     journal = {Manuscripta mathematica},
     pages = {53--68},
     publisher = {mathdoc},
     volume = {35},
     year = {1981},
     zbl = {0483.55005},
     url = {http://geodesic.mathdoc.fr/item/MM2_1981__35_154784/}
}