Keyeux, A., & Ochrymowiczbemelmans, D. (1983). Early Behavior of Tc-99m-pertechnetate in the Head After Intravenous Bolus Injection - its Relevance To the Cerebral Blood-circulation. European journal of nuclear medicine, 8(5), 196-200. https://doi.org/10.1007/BF00253765 (Original work published 1983)