Please find below the following usefull links
Authorities
FDA
Japan
European Union
Heilmittelkontrolle Schweiz Suisse
Guidelines
FDA current Good Manufacturing Practice Part 210
FDA Current Good Manufacturing Practice Part 211
Eudralex
Leitfaden der Guten Herstellungspraxis Teile I
Leitfaden der Guten Herstellungspraxis Teile II
GAMP 5: A Risk-Based Approach to Compliant GxP Computerized Systems