Books   Potschke A., R. Bhattacharyya, Abdel-Goad M., Janke A. and Goering H. (2005): Melt Mixed Blends of Carbon Nanotube filled Polycarbonate with Polyethylene”In: D.J. Brunelle, M.R. Korn, Advances in Polycarbonates, ACS-    Series 898, Chapter 13, pp. 164-177, Oxford University Press, February 2005, ISBN 0-8412-3887-1.   Guba, I. (2002): Oman – Wunderland der Geologie. – 402 pages, 407 figures, ISBN 9948-03-033 8.– Muscat, Sultanate of Oman (Sultan Qaboos University, Press and Publishing Section, Department of Public Relations and Information). I. Guba, Stone Treasures of Oman, Al-Roya Publishing, Sultanate of Oman, 2001.   Book Chapters Omar Houache, Numerical Methods in Chemical Engineering, First Chapter Guba, I. (2002): The Tale of the Vanishing Mountain. Weathering and Erosion. – In: PRIDE 2002, Annual Edition, English and Arabic. – Muscat, Sultanate of Oman (Al Roya Publishing).