@article{TAC_1995_1_a0,
     author = {Michael Barr},
     title = {Oriented {Singular} {Homology}},
     journal = {Theory and applications of categories},
     pages = {1--9},
     publisher = {mathdoc},
     volume = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_1995_1_a0/}
}