| article html file updated | 7 February 2020 18:45 CET | Update | https://www.mdpi.com/2079-4983/7/4/31 |
| article html file updated | 22 September 2019 07:29 CEST | Update | - |
| article html file updated | 4 May 2019 21:03 CEST | Update | - |
| article html file updated | 11 December 2018 08:39 CET | Update | - |
| article html file updated | 29 December 2016 11:48 CET | Update | - |
| article html file updated | 29 November 2016 10:05 CET | Original file | - |
| article xml uploaded. | 29 November 2016 10:04 CET | Update | https://www.mdpi.com/2079-4983/7/4/31/xml |
| article xml uploaded. | 29 November 2016 10:04 CET | Original file | - |
| article pdf uploaded. | 29 November 2016 10:04 CET | Version of Record | https://www.mdpi.com/2079-4983/7/4/31/pdf |
