[Fifty] 50 Years of Social Security Coordination Past - Present - Future. Luxembourg: Europ. Commission, 2009 243 с. : със сн. 978-92-79-14867-5.
[Fifty] 50 Years of Social Security Coordination Past - Present - Future. Luxembourg: Europ. Commission, 2009 243 с. : със сн. 978-92-79-14867-5.
(2009) [Fifty] 50 Years of Social Security Coordination Past - Present - Future, Luxembourg: Europ. Commission 243 с. : със сн. 978-92-79-14867-5.
(2009). [Fifty] 50 Years of Social Security Coordination Past - Present - Future. Report of the Conference Celebrating the 50th Anniversary of the European Coordination of Social Security, Prague, 7 - 8 May 2010. Luxembourg: Europ. Commission, 243 с. : със сн.
[Fifty] 50 Years of Social Security Coordination Past - Present - Future: Report of the Conference Celebrating the 50th Anniversary of the European Coordination of Social Security, Prague, 7 - 8 May 2010. Luxembourg: Europ. Commission; 2009. p. 243 с. : със сн. ISBN: 978-92-79-14867-5.
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