1Erickson SJ. Hendrix LE, Massaro BM. et al. Color Doppler flow imaging of the normal and abnormal orbit. Radiology, 1989. 173:511-513.
2Gulanid AC, Morparia H, Bhatti SS,et al.Colour Doppler sonography: A new investigative modality for intraocular space occupying lesions. Eye,1994,8:307-310.