1. Performance of roundabouts under heavy demand conditions;Akcelik;Road Transp. Res.,1996
2. Akcelik, R., Chung, E. and Besley, M., 1997. Analysis of roundabout performance by modelling approach flow interactions. Proceedings of the Third International Symposium on Intersections Without Traffic Signals, July 1997, Portland, Oregon, USA, pp 15-25.
3. Akcelik, R., Chung, E. and Besley, M., 1999. Roundabouts: Capacity and Performance Analysis. Research Report ARR No. 321. ARRB Transport Research Ltd, Vermont South, Australia (2nd Ed. 1999).
4. Akcelik, R., 2005 Capacity of Performance Analysis of Roundabout Metering Signals, TRB National Roundabout Conference, Vail-Colorado, pp. 1-19.
5. Akcelik, R. 2006. Operating Cost, Fuel Consumption and Pollutant Emission Savings at a Roundabout with Metering Signals, 7th International Congress on Advances in Civil Engineering (ACE 2006), Istanbul-Turkey, pp. 1-14.