@article{10_4153_CJM_1977_114_4,
     author = {Heath, Philip R.},
     title = {Homotopy {Equivalence} of a {Cofibre} {Fibre} {Composite}},
     journal = {Canadian journal of mathematics},
     pages = {1152--1156},
     year = {1977},
     volume = {29},
     number = {6},
     doi = {10.4153/CJM-1977-114-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-114-4/}
}