| article html file updated | 9 February 2020 17:15 CET | Update | https://www.mdpi.com/2224-2708/7/2/21 |
| article html file updated | 3 October 2019 11:57 CEST | Update | - |
| article html file updated | 30 April 2019 20:36 CEST | Update | - |
| article html file updated | 16 April 2019 21:03 CEST | Update | - |
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| article html file updated | 28 June 2018 08:41 CEST | Update | - |
| article html file updated | 11 May 2018 12:10 CEST | Original file | - |
| article pdf uploaded. | 11 May 2018 12:09 CEST | Version of Record | https://www.mdpi.com/2224-2708/7/2/21/pdf |
| article xml uploaded. | 11 May 2018 12:09 CEST | Update | https://www.mdpi.com/2224-2708/7/2/21/xml |
| article xml file uploaded | 11 May 2018 12:09 CEST | Original file | - |
