1. Schaible, S.,Maximization of Quasi-Concave Quotients and Products of Finitely Many Functionals, Cahiers du Centre D'Etudes de Recherche Operationelle, Vol. 16, pp. 45–53, 1976.
2. Schaible, S.,Fractional Programming, Zeitschrift für Operations Research, Vol. 27, pp. 39–54, 1983.
3. Bector, C. R.,Duality in Nonlinear Fractional Programming, Zeitschrift für Operations Research, Vol. 17, pp. 183–193, 1973.
4. Craven, B. D., andMond, B.,The Dual of a Fractional Linear Program, Journal of Mathematical Analysis and Applications, Vol. 42, pp. 507–512, 1973.
5. Jagannathan, R.,Duality for Nonlinear Fractional Programs, Zeitschrift für Operations Research, Vol. 18, pp. 1–3, 1973.