@article{TAC_2001_8_a18,
     author = {Mark W. Johnson},
     title = {A sheaf-theoretic view of loop spaces},
     journal = {Theory and applications of categories},
     pages = {490--508},
     publisher = {mathdoc},
     volume = {8},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2001_8_a18/}
}