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DOI: https://doi.org/10.2478/bjes-2013-0003 | Journal eISSN: 2674-4619 (formerly 2228-0596) | Journal ISSN: 2674-4600 (formerly 2228-0596)
Language: English
Page range: 29 - 43
Published online: Jun 18, 2013
Published in print: Jun 1, 2013
Published by: Tallinn University of Technology
In partnership with: Paradigm Publishing Services
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© 2013 Juhan Värk, published by Tallinn University of Technology
This work is licensed under the Creative Commons License.