By Enflo Per   in Quaestiones Mathematicae

ISSN:1727-933X|34|1|119-123

Taylor & Francis Ltd‎(2011)‎

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By Khazafi Khadija   Rueda Norma   Enflo Per   in Journal of Global Optimization

ISSN:0925-5001|46|1|111-132

Springer Publishing Company ‎(2010)‎

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