| article html file updated | 9 February 2020 05:10 CET | Update | https://www.mdpi.com/2077-0472/8/2/20 |
| article html file updated | 30 September 2019 10:24 CEST | Update | - |
| article html file updated | 1 May 2019 21:47 CEST | Update | - |
| article html file updated | 17 April 2019 20:35 CEST | Update | - |
| article html file updated | 28 March 2019 20:09 CET | Update | - |
| article html file updated | 14 March 2018 08:35 CET | Update | - |
| article html file updated | 1 February 2018 16:01 CET | Original file | - |
| article xml uploaded. | 1 February 2018 10:23 CET | Original file | https://www.mdpi.com/2077-0472/8/2/20/xml |
| article pdf uploaded. | 1 February 2018 10:23 CET | Version of Record | https://www.mdpi.com/2077-0472/8/2/20/pdf |
