Vorst, A. (1985). Some properties of nonlinear migration model. Econometric Institute, Erasmus University.
Lua i Stíl Chicago (17ú heag.)Vorst, A.C.F. Some Properties of Nonlinear Migration Model. Rotterdam: Econometric Institute, Erasmus University, 1985.
Lua MLA (9ú heag.)Vorst, A.C.F. Some Properties of Nonlinear Migration Model. Econometric Institute, Erasmus University, 1985.
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