[One thousand nine hundred and eighty nine] 1989-1999 Ten Years Later. Sofia: "Scorpion" Publishing House, 2000 416 p.,il. 954-8210-48-7.
[One thousand nine hundred and eighty nine] 1989-1999 Ten Years Later. Sofia: "Scorpion" Publishing House, 2000 416 p.,il. 954-8210-48-7.
(2000) [One thousand nine hundred and eighty nine] 1989-1999 Ten Years Later, Sofia: "Scorpion" Publishing House 416 p.,il. 954-8210-48-7.
(2000). [One thousand nine hundred and eighty nine] 1989-1999 Ten Years Later. Lessons Learned for the Future. Sofia: "Scorpion" Publishing House, 416 p.,il.
[One thousand nine hundred and eighty nine] 1989-1999 Ten Years Later: Lessons Learned for the Future. Sofia: "Scorpion" Publishing House; 2000. p. 416 p.,il. ISBN: 954-8210-48-7.
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