| article html file updated | 24 December 2025 21:39 CET | Update | https://www.mdpi.com/2218-1997/6/9/156 |
| article html file updated | 1 September 2025 09:08 CEST | Update | N/A |
| article html file updated | 22 July 2022 08:10 CEST | Update | N/A |
| article pdf uploaded. | 1 October 2020 04:20 CEST | Updated version of record | https://www.mdpi.com/2218-1997/6/9/156/pdf |
| article html file updated | 23 September 2020 06:27 CEST | Original file | N/A |
| article pdf uploaded. | 23 September 2020 06:25 CEST | Updated version of record | https://www.mdpi.com/2218-1997/6/9/156/pdf-vor |
| article xml uploaded. | 23 September 2020 06:25 CEST | Update | https://www.mdpi.com/2218-1997/6/9/156/xml |
| article xml file uploaded | 23 September 2020 06:25 CEST | Original file | N/A |
| article pdf uploaded. | 22 September 2020 14:38 CEST | Updated version of record | https://www.mdpi.com/2218-1997/6/9/156/pdf-vor |
| article pdf uploaded. | 22 September 2020 14:38 CEST | Version of Record | https://www.mdpi.com/2218-1997/6/9/156/pdf-vor |
