@article{MAN_1982__259_163647,
     author = {A.L. Edmonds and J.H. Ewing},
     title = {Remarks on the {Cobordism} {Group} of {Surface} {Diffeomorphisms.}},
     journal = {Mathematische Annalen},
     pages = {497--504},
     publisher = {mathdoc},
     volume = {259},
     year = {1982},
     zbl = {0468.57023},
     url = {http://geodesic.mathdoc.fr/item/MAN_1982__259_163647/}
}