| article html file updated | 1 September 2025 19:14 CEST | Update | https://www.mdpi.com/2218-1997/7/2/21 |
| article html file updated | 23 July 2022 21:24 CEST | Update | N/A |
| article html file updated | 9 February 2021 06:14 CET | Original file | N/A |
| article pdf uploaded. | 9 February 2021 06:12 CET | Updated version of record | https://www.mdpi.com/2218-1997/7/2/21/pdf |
| article xml uploaded. | 9 February 2021 06:12 CET | Update | https://www.mdpi.com/2218-1997/7/2/21/xml |
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| article pdf uploaded. | 20 January 2021 17:35 CET | Version of Record | https://www.mdpi.com/2218-1997/7/2/21/pdf-vor |
