| article html file updated | 23 October 2025 06:41 CEST | Update | https://www.mdpi.com/2076-2615/9/4/121 |
| article html file updated | 30 August 2025 13:26 CEST | Update | - |
| article html file updated | 19 July 2022 16:56 CEST | Update | - |
| article html file updated | 12 February 2020 01:16 CET | Update | - |
| article html file updated | 17 October 2019 07:29 CEST | Update | - |
| article html file updated | 8 May 2019 15:42 CEST | Update | - |
| article html file updated | 25 April 2019 20:34 CEST | Update | - |
| article html file updated | 11 April 2019 15:46 CEST | Update | - |
| article html file updated | 28 March 2019 10:57 CET | Original file | - |
| article pdf uploaded. | 28 March 2019 07:27 CET | Version of Record | https://www.mdpi.com/2076-2615/9/4/121/pdf |
| article xml uploaded. | 28 March 2019 07:27 CET | Update | https://www.mdpi.com/2076-2615/9/4/121/xml |
| article xml file uploaded | 28 March 2019 07:27 CET | Original file | - |
