Vitek, L., K. Krauße, and W. Fierz. “Diagnostic Significance of Intrathecally Produced Herpes Simplex and Varizella-Zoster Virus-Specific Antibodies in Central Nervous System Infections”. Swiss Medical Weekly, vol. 134, no. 4748, Nov. 2004, pp. 700-4, doi:10.4414/smw.2004.10766.