1. G. Richard, Ailleurs l’herbe est plus verte, Histoire des migrations dans le monde, Panoramiques-Corlet, 1996.
2. Economic models of migration;Åndersson,1982
3. A dynamic migration theory and its evaluation of concrete systems;Haag;Regional Science and Urban Economics,1986
4. A mathematical theory of migration;Hotelling;Environment and Planning,1978
5. The Self-Organizing Economy;Krugman,1996