@article{CM_1973__27_2_185_0,
     author = {Eggar, M. H.},
     title = {Ex-homotopy theory},
     journal = {Compositio Mathematica},
     pages = {185--195},
     publisher = {Noordhoff International Publishing},
     volume = {27},
     number = {2},
     year = {1973},
     mrnumber = {353311},
     zbl = {0272.55023},
     language = {en},
     url = {http://www.numdam.org/item/CM_1973__27_2_185_0/}
}