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Non-linear synamical systems theory and locational analysis
Clarke, M., (1986)
Bemerkungen zur praktischen Durchführung des Verfahrens von Runge-Kutta-Fehlberg
Spicher, K., (1967)
Urban dynamics of some French cities
Pumain, D., (1986)
A general method for solving constrained optimization problems
Resina, Cosimo, (1985)