| article html file updated | 30 August 2025 09:45 CEST | Update | https://www.mdpi.com/2075-4434/6/4/137 |
| article html file updated | 17 July 2022 14:22 CEST | Update | - |
| article html file updated | 11 February 2020 02:07 CET | Update | - |
| article html file updated | 11 October 2019 16:49 CEST | Update | - |
| article html file updated | 27 April 2019 21:47 CEST | Update | - |
| article html file updated | 13 April 2019 17:38 CEST | Update | - |
| article html file updated | 2 April 2019 10:21 CEST | Update | - |
| article html file updated | 25 December 2018 04:02 CET | Update | - |
| article html file updated | 9 December 2018 08:52 CET | Original file | - |
| article pdf uploaded. | 9 December 2018 08:51 CET | Version of Record | https://www.mdpi.com/2075-4434/6/4/137/pdf |
| article xml uploaded. | 9 December 2018 08:51 CET | Update | https://www.mdpi.com/2075-4434/6/4/137/xml |
| article xml file uploaded | 9 December 2018 08:51 CET | Original file | - |
