@article{MZ_1973__131_171903,
     author = {Darrell W. Hajek and Richard G. Wilson},
     title = {The {Non-Simplicity} of {Certain} {Categories} of {Topological} {Spaces.}},
     journal = {Mathematische Zeitschrift},
     pages = {357--360},
     publisher = {mathdoc},
     volume = {131},
     year = {1973},
     zbl = {0257.54014},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__131_171903/}
}