. Ana Nieto, Department of Statistics, University of Salamanca, Spain
. Carlos Ramos, Department of Mathematics, University of Évora, Portugal
. Ding-Geng Chen, Arizona State University, Phoenix, USA and University of Pretoria, South Africa
. Dharmendra Tripathi, National Institute of Technology, Uttarakhand, India
. Padmanabhan Seshaiyer, George Mason University, USA
. Sotiris Bersimis, University of Piraeus, Greece