Vitalfärbung am Zentralnervensystem. Beitrag zur Physio-pathologie des Plexus choroideus und der Hirnhäute.

Goldmann was the first to demonstrate the blood-brain barrier. "By the intravenous and intrathecal administration of trypan blue he found that the barrier was impermeable to its large molecules, and he concluded that the choid plexuses were the sight of the holdup" Clarke & O"Malley, The human brain and spinal cord, 749).  Digital facsimile from the Internet Archive at this link.