1. Faculty of Engineering, Tarbiat Modarres University, Tehran, Iran.
2. Dept of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai – 76, India.
3. Institute of Technology, Banaras Hindu University, Varanasi – 221 005, India.
4. Dept of Mining Engg, Imam Khomeini International University of Ghazvin, Ghazvin, Iran.