BiD Network - Robert van Voren - http://www.bidnetwork.org/person/82279/en (2009-11-03)
Koninklijke Bibliotheek - http://opc4.kb.nl (2009-11-03)
LC Authorities - http://authorities.loc.gov (2009-11-03)
On dissidents and madness : from the Soviet Union of Leonid Brezhnev to the "Soviet
Union" of Vladimir Putin / Robert van Voren, 2009