| article html file updated | 8 February 2020 21:45 CET | Update | https://www.mdpi.com/2075-4663/5/4/88 |
| article html file updated | 28 September 2019 15:10 CEST | Update | - |
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| article html file updated | 21 November 2017 09:41 CET | Original file | - |
| article xml uploaded. | 21 November 2017 09:40 CET | Original file | https://www.mdpi.com/2075-4663/5/4/88/xml |
| article pdf uploaded. | 21 November 2017 09:40 CET | Version of Record | https://www.mdpi.com/2075-4663/5/4/88/pdf |
