[1] J. Bair: Structure asymptotique et propriétés de séparation en geometrie convexe. Research Report, Université de Liège, 1984.
[2] A. Cambini, Martein: On the Fenchel-like and Lagrangian Duality in Fractional Programming. Research Report, University di Pisa, 1985.
[3] Tran Quoc Chien: 
Duality in vector optimization, I: abstract duality scheme. Kybernetika 20 (1984), 4, 304-313. 
MR 0768510 | 
Zbl 0556.49010 
[4] Tran Quoc Chien: 
Duality in vector optimization, II: vector quasiconcave programming. Kybernetika 20 (1984), 5, 386-404. 
MR 0776328 | 
Zbl 0575.49006 
[5] Tran Quoc Chien: 
Duality in vector optimization, III: vector partially quasiconcave programming and vector fractional programming. Kybernetika 20 (1984), 6, 458-472. 
MR 0777980 | 
Zbl 0575.49007 
[6] Tran Quoc Chien: 
Nondifferentiable and quasidifferentiable duality in vector optimization theory. Kybernetika 21 (1985), 4, 298-312. 
MR 0815617 | 
Zbl 0579.90091 
[7] Tran Quoc Chien: Duality Theory in Vector Optimization. Ph. D. Thesis, Charles University, Prague 1985.
[8] G. Grätzen: Lattice Theory. W. H. Freedman and Company, San Francisco 1971.
[9] R. B. Holmes: 
Geometrical Functional Analysis and Its Applications. Springer-Verlag, New York 1975. 
MR 0410335 
[10] S. Schaible: 
Duality in fractional programming: a unified approach. Oper. Res. 24 (1976), 3, 452-461. 
MR 0411644 | 
Zbl 0348.90120