| article html file updated | 30 August 2025 12:59 CEST | Update | https://www.mdpi.com/2227-7102/9/1/57 |
| article html file updated | 19 July 2022 16:21 CEST | Update | - |
| article html file updated | 11 February 2020 22:11 CET | Update | - |
| article html file updated | 16 October 2019 14:25 CEST | Update | - |
| article html file updated | 26 April 2019 03:17 CEST | Update | - |
| article html file updated | 11 April 2019 22:19 CEST | Update | - |
| article html file updated | 10 April 2019 21:29 CEST | Update | - |
| article html file updated | 4 April 2019 13:15 CEST | Update | - |
| article html file updated | 14 March 2019 10:36 CET | Original file | - |
| article pdf uploaded. | 14 March 2019 10:35 CET | Version of Record | https://www.mdpi.com/2227-7102/9/1/57/pdf |
| article xml uploaded. | 14 March 2019 10:35 CET | Update | https://www.mdpi.com/2227-7102/9/1/57/xml |
| article xml file uploaded | 14 March 2019 10:35 CET | Original file | - |
