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Communicated by L. Cesari
K. Gustafson was partially supported by the National Science Foundation under Grant 15239-A1; D. Sather was partially supported by the National Science Foundation under Grant 19712.
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Gustafson, K., Sather, D. Large nonlinearities and monotonicity. Arch. Rational Mech. Anal. 48, 109–122 (1972). https://doi.org/10.1007/BF00250428
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DOI: https://doi.org/10.1007/BF00250428