| article html file updated | 26 December 2025 14:06 CET | Update | https://www.mdpi.com/2218-1997/8/1/6 |
| article html file updated | 7 September 2025 10:04 CEST | Update | N/A |
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| article html file updated | 25 December 2021 03:37 CET | Original file | N/A |
| article pdf uploaded. | 25 December 2021 03:36 CET | Updated version of record | https://www.mdpi.com/2218-1997/8/1/6/pdf |
| article xml uploaded. | 25 December 2021 03:36 CET | Update | https://www.mdpi.com/2218-1997/8/1/6/xml |
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| article pdf uploaded. | 23 December 2021 17:59 CET | Version of Record | https://www.mdpi.com/2218-1997/8/1/6/pdf-vor |
