| article html file updated | 7 February 2020 19:32 CET | Update | https://www.mdpi.com/1422-8599/2016/4/M921 |
| article html file updated | 22 September 2019 11:04 CEST | Update | - |
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| article html file updated | 27 October 2017 08:21 CEST | Update | - |
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| article xml uploaded. | 26 September 2017 09:58 CEST | Update | https://www.mdpi.com/1422-8599/2016/4/M921/xml |
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| article html file updated | 13 December 2016 12:12 CET | Original file | - |
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| article pdf uploaded. | 13 December 2016 12:11 CET | Version of Record | https://www.mdpi.com/1422-8599/2016/4/M921/pdf |
