| article html file updated | 9 February 2020 06:07 CET | Update | https://www.mdpi.com/2313-0105/4/1/8 |
| article html file updated | 30 September 2019 16:17 CEST | Update | - |
| article html file updated | 1 May 2019 19:36 CEST | Update | - |
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| article html file updated | 27 March 2018 15:38 CEST | Update | - |
| article html file updated | 9 February 2018 17:24 CET | Original file | - |
| article xml uploaded. | 9 February 2018 17:23 CET | Update | https://www.mdpi.com/2313-0105/4/1/8/xml |
| article xml uploaded. | 9 February 2018 17:23 CET | Original file | - |
| article pdf uploaded. | 9 February 2018 17:23 CET | Version of Record | https://www.mdpi.com/2313-0105/4/1/8/pdf |
