@article{MZ_1973__134_171965,
     author = {Rainer M. Vogt},
     title = {Homotopy {Limits} and {Colimits.}},
     journal = {Mathematische Zeitschrift},
     pages = {11--52},
     publisher = {mathdoc},
     volume = {134},
     year = {1973},
     zbl = {0276.55006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__134_171965/}
}