1. V. M. Polterovich, Economic Equilibrium and Economic Mechanism (Nauka, Moscow, 1990) [in Russian].
2. A. Jofré, R. T. Rockafellar, and R. J.-B. Wets, “Variational Inequalities and Economic Equilibrium,” www.math.ucdavis.edu/:_rjbw/articles/VIequil.pdf (2005).
3. A. I. Sotskov, “Pure Exchange Model,” in Encyclopedic Dictionary of Mathematical Economics (Bol’shaya Sovetskaya Entsiklopediya, Moscow, 2003) [in Russian].
4. B. G. Mirkin, The Group Selection Problem (Nauka, Moscow, 1974) [in Russian].
5. S. Zlobec, Stable Parametric Programming (Kluwer, Dordrecht, 2001).