@article{IM_1988__92_1_143567,
     author = {Daniel S. Freed},
     title = {Z/k-Manifolds and families of {Dirac} operators.},
     journal = {Inventiones mathematicae},
     pages = {243--254},
     publisher = {mathdoc},
     volume = {92},
     number = {1},
     year = {1988},
     zbl = {0651.58034},
     url = {http://geodesic.mathdoc.fr/item/IM_1988__92_1_143567/}
}