| article html file updated | 31 August 2025 16:36 CEST | Update | https://www.mdpi.com/2218-1997/6/4/51 |
| article html file updated | 21 July 2022 01:05 CEST | Update | - |
| article html file updated | 8 April 2020 03:55 CEST | Update | - |
| article pdf uploaded. | 8 April 2020 03:54 CEST | Updated version of record | https://www.mdpi.com/2218-1997/6/4/51/pdf |
| article xml uploaded. | 8 April 2020 03:54 CEST | Update | https://www.mdpi.com/2218-1997/6/4/51/xml |
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| article html file updated | 6 April 2020 12:36 CEST | Original file | - |
| article pdf uploaded. | 6 April 2020 12:35 CEST | Version of Record | https://www.mdpi.com/2218-1997/6/4/51/pdf-vor |
| article xml file uploaded | 6 April 2020 12:35 CEST | Original file | - |
