K. Abodayeh,   Prince Sultan University, Saudi Arabia

David Barilla,   University of Messina, Italy

Rodolfo Bontempo,   University of Naples Federico II, Italy

Lucianna Cananà,   University of Bari Aldo Moro, Italy

Roberto Caimmi,   Padua University, Italy

Giuseppe Caristi,   University of Messina, Italy

Tiziana Ciano,   University of Aosta Valley, Italy

Wei-Shih Du, National Kaohsiung Normal University, Taiwan

Luca Grilli,   Universita degli Studi di Foggia, Italy

Maria Letizia Guerra,   University of Bologna, Italy

Tzung-Pei Hong,   National University of Kaohsiung, Taiwan

B. Oluyede,   Georgia Southern University, USA

Francesco Rania,   Magna Graecia University, Italy

Z. Retchkiman,   Instituto Politecnico Nacional, Mexico

Cheon Seoung Ryoo,   Hannam University, Korea

Domenico Santoro,   University of Foggia, Italy

M. de la Sen,   Basque Country University, Spain

I. Sindayigaya,   Doctoral School at the University of Burundi

F. T. Suttmeier,   University of Siegen, Germany

Andrea Vacca,   Universita di Napoli, Italy