A geometric characterization of strong duality in nonconvex quadratic programming with linear and nonconvex quadratic constraints. - Fabián Flores Bazán; Gabriel Cárcamo (Math. Program., 2014)

Strong duality and KKT conditions in nonconvex optimization with a single equality constraint and geometric constraint. - Gabriel Cárcamo; Fabián Flores Bazán (Math. Program., 2018)