MathSciNet bibliographic data MR269957 (42 #4850) 34.95 Goebel, K.; Rzymowski, W. An existence theorem for the equation $x\sp{\prime} =f(t,\,x)$$x\sp{\prime} =f(t,\,x)$ in Banach space. Bull. Acad. Polon. Sci. Sér. Sci. Math. Astronom. Phys. 18 1970 367–370. Links to the journal or article are not yet available

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