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@article{DCG_1993__10_2_131256, author = {A.I. Barvinok}, title = {Feasibility {Testing} for {Systems} of {Real} {Quadratic} {Equations.}}, journal = {Discrete & computational geometry}, pages = {1--14}, publisher = {mathdoc}, volume = {10}, number = {2}, year = {1993}, zbl = {0812.12006}, url = {http://geodesic.mathdoc.fr/item/DCG_1993__10_2_131256/} }
A.I. Barvinok. Feasibility Testing for Systems of Real Quadratic Equations.. Discrete & computational geometry, Tome 10 (1993) no. 2, pp. 1-14. http://geodesic.mathdoc.fr/item/DCG_1993__10_2_131256/