Matzeu, M., & Vignoli, A. Topological Nonlinear Analysis II: Degree, Singularity and Variations. Springer International Publishing.
Style de citation Chicago (17e éd.)Matzeu, Michele, et Alfonso Vignoli. Topological Nonlinear Analysis II: Degree, Singularity and Variations. Cham: Springer International Publishing.
Style de citation MLA (8e éd.)Matzeu, Michele, et Alfonso Vignoli. Topological Nonlinear Analysis II: Degree, Singularity and Variations. Springer International Publishing.
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