1. Katwan, M. J. and Al-Sofi, G. A., “Influence of Petroleum Products on the Electrochemical Characteristic of Steel Reinforcement in Concrete”, Al-Muhandis Journal, Vol. 4, No. 13, Jan. 1998, pp. 2-5. 
2. Katwan, M. J. and Al-Sofi, G. A., “Investigation and Repair of Deteriorated Reinforced Concrete Bridge in Hot Climates”, Al-Muhandis Journal, Vol. 4, No. 13, Jan. 1998, pp. 2-5.
3. Katwan, M. J. and Al-Sofi, G. A., “Technical Aspects of Concrete Resistance Measurement”, Proceeding of the International Congress of the University of Dundee, UK, 6-10 Sept. 1999.
4. Katwan, M. J. and Al-Sofi, G. A., “In Situ Resistance Monitoring”, Proceeding of the Second Jordanian Civil Engineering Conference, Jordan, Nov.1999, pp. 47-60.
5. Katwan, M.J and Al-Sofi, G, A., “Evaluation of Corrosion Inhibitors”, Technical Report No. B1/2000, National Centre for Construction Laboratories (NCCL), Baghdad, April 2000.
6. Katwan, M. J. and Al-Sofi, G. A., “New Performance Evaluation Technique for Cathodic Protection of Reinforced Concrete Structures”, send to be published in Materials and Structural Journal, Rilem.

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