1. Spinal anesthesia and local medication of the cord;Corning;NY Med. J.,1885
2. Versuche uber Cocainisirung des Ruckenmarkes [Experiments on the cocainization of the spinal cord];Bier;Dtsche Z Chir.,1899
3. Opiate Receptor: Demonstration in Nervous Tissue;Pert;Science,1973
4. Pain Relief by Intrathecally Applied Morphine in Man;Wang;Anesthesiology.,1995
5. Current perspectives on intrathecal drug delivery;Bottros;J. Pain Res.,2014