MathSciNet bibliographic data MR240690 49.10 Aronsson, Gunnar Minimization problems for the functional ${\rm sup}\sb{x}\,F(x,\,f(x),\,f\sp{\prime} \,(x))$${\rm sup}\sb{x}\,F(x,\,f(x),\,f\sp{\prime} \,(x))$. III. Ark. Mat. 7 (1969), 509–512. Article

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