लेखक: Raj K. Arya

Raj K. Arya, Ph D, is an Associate Professor in the Department of Chemical Engineering at Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, India. George D. Verros, Ph D, works as a Chemical Engineer for public sector environmental projects in Greece. J. Paulo Davim, Ph D, is a Full Professor in the Department of Mechanical Engineering at the University of Aveiro, Portugal.