Fathullah, H. S., H. M. Majid, C. H. Ahmed, S. H. Sourkan, K. S. Ismael, and B. Z. Abdulsamad. “Traffic Circulation Efficiency of Elliptical Roundabouts”. ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY, Vol. 11, no. 2, Sept. 2023, pp. 65-72, doi:10.14500/aro.11150.