| article html file updated | 9 February 2020 06:05 CET | Update | https://www.mdpi.com/2079-6412/8/2/68 |
| article html file updated | 30 September 2019 16:05 CEST | Update | - |
| article html file updated | 1 May 2019 19:41 CEST | Update | - |
| article html file updated | 17 April 2019 18:49 CEST | Update | - |
| article html file updated | 28 March 2019 22:09 CET | Update | - |
| article html file updated | 14 March 2018 08:51 CET | Update | - |
| article html file updated | 9 February 2018 17:16 CET | Original file | - |
| article xml uploaded. | 9 February 2018 17:15 CET | Update | https://www.mdpi.com/2079-6412/8/2/68/xml |
| article xml uploaded. | 9 February 2018 17:15 CET | Original file | - |
| article pdf uploaded. | 9 February 2018 17:15 CET | Version of Record | https://www.mdpi.com/2079-6412/8/2/68/pdf |
