[1] B. GLOVER: 
A generalized Farkas Lemma with applications to quasi-differentiable programming. Zeit. Oper. Res. 26 (1982), 125-141. 
MR 0686601[2] J. HORVATH: 
Topological Vector Spaces and Distributions. Addison-Wesley, Reading, Mass., 1966. 
MR 0205028 | 
Zbl 0143.15101[3] S. KURCYUSZ: 
On the existence and nonexistence of Lagrange multipliers in Banach spaces. J. Opt. Theory Appl. 20 (1976), 81-110. 
MR 0424249 | 
Zbl 0309.49010[4] J-P. FENOT: 
On the existence of Lagrange multipliers in nonlinear programming in Banach spaces. Lecture Hotes in Control and Information Sciences, 30, 1980, 89-104. 
MR 0618476[6] C. ZALINESCU: 
A generalization of the Farkas Lemma and applications to convex programming. J. Math. Anal. Appl. 66 (1978), 651-678. 
MR 0517753 | 
Zbl 0396.90070[7] C. ZALINESCU: 
On an abstract control problem. Numer. Func. Anal. Opt. 2 (1980), 531-542. 
MR 0605758 | 
Zbl 0476.49007