| article html file updated | 9 February 2020 06:00 CET | Update | https://www.mdpi.com/2218-273X/8/1/9 |
| article html file updated | 30 September 2019 15:42 CEST | Update | - |
| article html file updated | 1 May 2019 19:51 CEST | Update | - |
| article html file updated | 17 April 2019 18:57 CEST | Update | - |
| article html file updated | 28 March 2019 22:00 CET | Update | - |
| article html file updated | 27 March 2018 14:24 CEST | Update | - |
| article html file updated | 10 February 2018 03:56 CET | Original file | - |
| article xml uploaded. | 10 February 2018 03:55 CET | Original file | https://www.mdpi.com/2218-273X/8/1/9/xml |
| article pdf uploaded. | 10 February 2018 03:55 CET | Updated version of record | https://www.mdpi.com/2218-273X/8/1/9/pdf |
| article pdf uploaded. | 8 February 2018 17:53 CET | Version of Record | https://www.mdpi.com/2218-273X/8/1/9/pdf-vor |
