@article{MZ_1980__175_173022,
     author = {Michael Mather and Marshall Walker},
     title = {Commuting {Homotopy} {Limits} and {Colimits.}},
     journal = {Mathematische Zeitschrift},
     pages = {77--80},
     publisher = {mathdoc},
     volume = {175},
     year = {1980},
     zbl = {0447.55004},
     url = {http://geodesic.mathdoc.fr/item/MZ_1980__175_173022/}
}