NSRG and ESNCH Guidelines and Recommendations
Grading carotid stenosis using ultrasonic methods. von Reutern GM, Goertler MW, Bornstein NM, Del Sette M, Evans DH, Hetzel A, Kaps M, Perren F, Razumovky A, von Reutern M, Shiogai T, Titianova E, Traubner P, Venketasubramanian N, Wong LK, Yasaka M; Neurosonology Research Group of the World Federation of Neurology.
Stroke. 2012 Mar;43(3):916-21.
Free full text: http://stroke.ahajournals.org/content/43/3/916.long
Consensus opinion on diagnosis of cerebral circulatory arrest using Dopplersonography: Task Force Group on cerebral death of the Neorosonology Research Group of the World Federation of Neurology.
Ducrocq X, Hassler W, Moritake K, Newell DW, von Reutrn GM, Shiogai T, Smith RR.
J Neurol Sci. 1998 Aug 14; 159(2):145-50.
Abstract: http://www.ncbi.nlm.nih.gov/pubmed/9741398