| article html file updated | 30 August 2025 10:19 CEST | Update | https://www.mdpi.com/2073-4409/8/1/9 |
| article html file updated | 17 July 2022 18:31 CEST | Update | - |
| article html file updated | 11 February 2020 05:06 CET | Update | - |
| article html file updated | 12 October 2019 10:52 CEST | Update | - |
| article html file updated | 27 April 2019 15:03 CEST | Update | - |
| article html file updated | 13 April 2019 10:55 CEST | Update | - |
| article html file updated | 2 April 2019 18:17 CEST | Update | - |
| article html file updated | 30 January 2019 03:17 CET | Update | - |
| article html file updated | 24 December 2018 13:27 CET | Original file | - |
| article pdf uploaded. | 24 December 2018 12:08 CET | Version of Record | https://www.mdpi.com/2073-4409/8/1/9/pdf |
| article xml uploaded. | 24 December 2018 12:08 CET | Update | https://www.mdpi.com/2073-4409/8/1/9/xml |
| article xml file uploaded | 24 December 2018 12:08 CET | Original file | - |
