Fonte positiva dos dados

http://authorities.loc.gov/cgi-bin/Pwebrecon.cgi?AuthRecID=1342370&v1=1&HC=1&SEQ=20161116135426&PID=DlNK0eBOndBAm-3SSNB8xM7RQ 16/11/2016: (Kohen, Gershom; m.1544)

https://viaf.org/processed/NLI%7C000052582 16/11/2016: (Kohen, Gershom; m.1544)

https://portal.dnb.de/opac.htm?method=simpleSearch&cqlMode=true&query=idn%3D138590192 16/11/2016: (Kohen, Gershom; m.1544)