Links
[1] https://www.h-brs.de/de/anna
[2] http://www.google.com/patents/US6927281
[3] https://www.google.com/patents/WO2003000114A3?cl=en&dq=Tobiasch&hl=de&sa=X&ei=4qGpUtb8N-ag7Abp0oCYDA&ved=0CD4Q6AEwAA
[4] https://www.h-brs.de/de/aktuelle-meldungen-der-h-brs-zum-coronavirus