@article{CTGDC_1968__10_4_449_0,
     author = {Chen, Yuh-Ching},
     title = {Costacks - {The} simplicial parallel of sheaf theory},
     journal = {Cahiers de topologie et g\'eom\'etrie diff\'erentielle},
     pages = {449--473},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {10},
     number = {4},
     year = {1968},
     mrnumber = {246934},
     zbl = {0177.51303},
     language = {en},
     url = {http://archive.numdam.org/item/CTGDC_1968__10_4_449_0/}
}