| article html file updated | 9 February 2020 13:53 CET | Update | https://www.mdpi.com/2075-4701/8/4/270 |
| article html file updated | 2 October 2019 15:22 CEST | Update | - |
| article html file updated | 1 May 2019 03:22 CEST | Update | - |
| article html file updated | 17 April 2019 03:46 CEST | Update | - |
| article html file updated | 29 March 2019 15:49 CET | Update | - |
| article html file updated | 1 May 2018 08:04 CEST | Update | - |
| article html file updated | 1 May 2018 08:04 CEST | Update | - |
| article html file updated | 15 April 2018 10:04 CEST | Original file | - |
| article xml uploaded. | 15 April 2018 10:02 CEST | Update | https://www.mdpi.com/2075-4701/8/4/270/xml |
| article pdf uploaded. | 15 April 2018 10:02 CEST | Version of Record | https://www.mdpi.com/2075-4701/8/4/270/pdf |