1
Published: [2016]
Superior document: Title is part of eBook package: De Gruyter DG Plus eBook-Package 2017
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2
Published: [2011]
Superior document: Title is part of eBook package: De Gruyter DG Studies in Nonlinear Analysis and Applications
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3
Published: 2001.
Superior document: De Gruyter series in nonlinear analysis and applications, 7
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