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Nonlinear generalization of the Frobenius theorem : a symmetric approach
Fujimoto, T., (1979)
The Frobenius theorem, its Solow-Samuelson extension and the Kuhn-Tucker theorem
Morishima, M., (1974)
The nonlinear Perron-Frobenius problem for set-valued maps in a closed convex cone in RN
Fujimoto, T., (1994)