3
8
Published in 2013
doi: 10.11720/j.issn.1000-8918.2013.6.11
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9
Published in 2011
doi: 10.2478/v10156-010-0018-z
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14
Published in 2015
doi: 10.14075/j.jgg.2015.02.033
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16
Published in 2011
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