On the second part of Hilbert’s 16th problem E. Oxenhielm This paper has been withdrawn from the Articles in Press section of ScienceDirect. Further referee reports, which provide speci,c details, show that the proof o-ered does not stand on a rigorous foundation and that further work is necessary. V. Lakshmikantham Editor-in-Chief
doi of original article 10.1016/j.na.2003.10.002
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