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Herrn Professor Dr. Wilhelm Stoll zum 70. Geburtstag gewidmet
The author is with the Mathematical Institute of the Polish Academy of Sciences.
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Cel, J. Infinite-dimensional Krasnosel'skii-type criteria for cones. Arch. Math 61, 478–483 (1993). https://doi.org/10.1007/BF01207547
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DOI: https://doi.org/10.1007/BF01207547