| article html file updated | 9 February 2020 17:33 CET | Update | https://www.mdpi.com/2073-4336/9/2/26 |
| article html file updated | 30 April 2019 19:59 CEST | Update | - |
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| article pdf uploaded. | 14 May 2018 17:39 CEST | Updated version of record | https://www.mdpi.com/2073-4336/9/2/26/pdf |
| article html file updated | 14 May 2018 17:37 CEST | Original file | - |
| article xml uploaded. | 14 May 2018 17:36 CEST | Original file | https://www.mdpi.com/2073-4336/9/2/26/xml |
