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On zero duality gap in nonconvex quadratic programming problems
Zheng, X., (2012)
Convex relaxations and MIQCQP reformulations for a class of cardinality-constrained portfolio selection problems
Cui, X., (2013)
Effects of land use changes on the groundwater table and the decline of Pinus sylvestris var. mongolica plantations in southern Horqin Sandy Land, Northeast China