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@article{MZ_1972__128_171806, author = {Lawrence L. Larmore and Thomas Emery}, title = {Mappings {Into} {Loop} {Spaces} and {Central} {Group} {Extensions.}}, journal = {Mathematische Zeitschrift}, pages = {277--296}, publisher = {mathdoc}, volume = {128}, year = {1972}, zbl = {0254.55010}, url = {http://geodesic.mathdoc.fr/item/MZ_1972__128_171806/} }
Lawrence L. Larmore; Thomas Emery. Mappings Into Loop Spaces and Central Group Extensions.. Mathematische Zeitschrift, Tome 128 (1972), pp. 277-296. http://geodesic.mathdoc.fr/item/MZ_1972__128_171806/