References
- Samuelson , P.A . 1938 . A Note on the Pure Theory of Consumer’s Behavior . Economica , 17 : 61 – 71 .
- Luc , D.T . 1993 . Characterizations of Quasiconvex Functions . Bull Austral. Math. Soc , 48 : 393 – 405 .
- Daniilidis , A and Hadjisavvas , N . 1997 . On the Subdifferentials of Quasiconvex and Pseudoconvex Functions and Cyciic Monotonicity , Samos , , Greece : University of the Aegean . Technical Report No. 97-08, Department of Mathematics
- Fan , K . 1961 . A Generalization of Tychonoff’s Fixed Point Theorem . Mathematische Annalen , 142 : 305 – 310 .