Literature Cited
J. Schauder, Der Fixpunktsatz in Funktionalräumen, Studia Math., 2, 171–180 (1930).
M. A. Krasnosel'skii, Topological Methods in the Theory of Nonlinear Integral Equations [in Russian], Moscow, Gostekhizdat (1956).
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Additional information
Voronezh State University. Translated from Funktsional'nyi Analiz i Ego Prilozheniya, Vol. 1, No. 2, pp. 74–76, April–June, 1967.
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Sadovskii, B.N. A fixed-point principle. Funct Anal Its Appl 1, 151–153 (1967). https://doi.org/10.1007/BF01076087
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DOI: https://doi.org/10.1007/BF01076087