1. R. Arena, C. Froeschle, D. Torre, and Bidard (1984 ). "Gravitation et Reproductibilite: Un Point de Vue Classique " in, op. cit..
2. L. Boggio, and Bidard (1984 ). "Convergence to Production Prices Under Alternative Disequilibrium Assumptions " in, op. cit..
3. ON THE STABILITY OF PRODUCTION PRICES