Keeranghat, P.P., D., J., M. L., P. and Gupta, R. 2018. Evaluation of normal variants of circle of Willis at MRI. International Journal of Research in Medical Sciences. 6, 5 (Apr. 2018), 1617–1622. DOI:https://doi.org/10.18203/2320-6012.ijrms20181497.