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@article{MS2_1981__49_166768, author = {Chih-Han Sah}, title = {Scissors congruences, {I.} {The} {Gauss-Bonnet} map.}, journal = {Mathematica Scandinavica}, pages = {181--210}, publisher = {mathdoc}, volume = {49}, year = {1981}, zbl = {0496.52003}, url = {http://geodesic.mathdoc.fr/item/MS2_1981__49_166768/} }
Chih-Han Sah. Scissors congruences, I. The Gauss-Bonnet map.. Mathematica Scandinavica, Tome 49 (1981), pp. 181-210. http://geodesic.mathdoc.fr/item/MS2_1981__49_166768/