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2. Topological fixed point principle for boundary value problems;Andres,2003
3. On the Banach contraction principle for multivalued mappings Approximation optimization and mathematical economics (Pointe-à-Pitre, 1999);Andres,2001
4. Metric and topological multivalued fractals;Andres;Int J Bifurcat Chaos Appl Sci Engrg,2004
5. Multivalued fractals;Andres;Chaos, Solitons & Fractals,2005