DSpace Community: http://hdl.handle.net/10506/794 Fri, 26 Dec 2025 02:43:35 GMT 2025-12-26T02:43:35Z Volume 2 http://hdl.handle.net/10506/1398 Title: Volume 2 Authors: Atanasova, Ivanka Thu, 13 Jul 2017 00:00:00 GMT http://hdl.handle.net/10506/1398 2017-07-13T00:00:00Z Volume 1 http://hdl.handle.net/10506/1370 Title: Volume 1 Authors: Spasov, Lubomir Thu, 08 Oct 2015 00:00:00 GMT http://hdl.handle.net/10506/1370 2015-10-08T00:00:00Z