| article html file updated | 8 February 2020 08:02 CET | Update | https://new.mdpi.com/2079-9721/5/2/15 |
| article html file updated | 25 September 2019 07:07 CEST | Update | - |
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| article html file updated | 13 June 2017 05:17 CEST | Original file | - |
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| article pdf uploaded. | 13 June 2017 05:16 CEST | Updated version of record | https://new.mdpi.com/2079-9721/5/2/15/pdf |
| article pdf uploaded. | 11 June 2017 11:32 CEST | Version of Record | https://new.mdpi.com/2079-9721/5/2/15/pdf-vor |
