| article html file updated | 9 February 2020 07:12 CET | Update | https://www.mdpi.com/2077-1312/6/1/20 |
| article html file updated | 30 September 2019 22:37 CEST | Update | - |
| article html file updated | 1 May 2019 17:14 CEST | Update | - |
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| article html file updated | 29 March 2019 00:31 CET | Update | - |
| article html file updated | 27 March 2018 15:40 CEST | Update | - |
| article html file updated | 24 February 2018 04:45 CET | Original file | - |
| article xml uploaded. | 24 February 2018 04:43 CET | Update | https://www.mdpi.com/2077-1312/6/1/20/xml |
| article xml uploaded. | 24 February 2018 04:43 CET | Update | - |
| article xml uploaded. | 24 February 2018 04:43 CET | Update | - |
| article xml uploaded. | 24 February 2018 04:43 CET | Original file | - |
| article pdf uploaded. | 24 February 2018 04:43 CET | Updated version of record | https://www.mdpi.com/2077-1312/6/1/20/pdf |
| article pdf uploaded. | 21 February 2018 17:16 CET | Version of Record | https://www.mdpi.com/2077-1312/6/1/20/pdf-vor |
