Geodesic
Optimality Conditions and Duality in Multiobjective Programming With $(Phi, ho)$-Invexity
Yugoslav journal of operations research, Tome 18 (2008) no. 2, p. 153 .

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$(\Phi, \rho)$−invexity has recently been introduced with the intent of generalizing invex functions in mathematical programming. Using such conditions we obtain new sufficiency results for optimality in multiobjective programming and extend some classical duality properties.
Classification : 90C29
Keywords: Multiobjective programming, invexity, duality. 
@article{YJOR_2008_18_2_a1,
     author = {Massimiliano Ferrara and Maria Viorica Stefanescu},
     title = {Optimality {Conditions} and {Duality} in {Multiobjective} {Programming} {With} $(Phi, 
ho)${-Invexity}},
     journal = {Yugoslav journal of operations research},
     pages = {153 },
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2008},
     zbl = {1199.90025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_2008_18_2_a1/}
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Massimiliano Ferrara; Maria Viorica Stefanescu. Optimality Conditions and Duality in Multiobjective Programming With $(Phi, 
ho)$-Invexity. Yugoslav journal of operations research, Tome 18 (2008) no. 2, p. 153 . http://geodesic.mathdoc.fr/item/YJOR_2008_18_2_a1/