| article html file updated | 9 February 2020 03:32 CET | Update | https://www.mdpi.com/2079-6412/8/1/39 |
| article html file updated | 30 September 2019 00:55 CEST | Update | - |
| article html file updated | 2 May 2019 01:18 CEST | Update | - |
| article html file updated | 17 April 2019 23:37 CEST | Update | - |
| article html file updated | 28 March 2019 16:38 CET | Update | - |
| article html file updated | 1 February 2018 10:37 CET | Update | - |
| article html file updated | 18 January 2018 15:33 CET | Original file | - |
| article xml uploaded. | 18 January 2018 15:32 CET | Update | https://www.mdpi.com/2079-6412/8/1/39/xml |
| article xml uploaded. | 18 January 2018 15:32 CET | Original file | - |
| article pdf uploaded. | 18 January 2018 15:32 CET | Version of Record | https://www.mdpi.com/2079-6412/8/1/39/pdf |
