Richard G. Barr

Guidelines and Good Clinical Practice Recommendations for Contrast Enhanced Ultrasound (CEUS) in the Liver – Update 2020 – WFUMB in Cooperation with EFSUMB, AFSUMB, AIUM, and FLAUS

M. C. Chammas, B. Choi, M. Kudo, 2020, Ultraschall in der Medizin - European Journal of Ultrasound.

Guidelines and Good Clinical Practice Recommendations for Contrast Enhanced Ultrasound (CEUS) in the Liver – Update 2012

J B Fowlkes, D A Clevert, F Forsberg, 2012, Ultraschall in der Medizin.