| article html file updated | 25 December 2025 03:07 CET | Update | https://www.mdpi.com/2218-1997/7/2/30 |
| article html file updated | 1 September 2025 20:11 CEST | Update | N/A |
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| article html file updated | 8 February 2021 06:19 CET | Original file | N/A |
| article pdf uploaded. | 8 February 2021 06:18 CET | Updated version of record | https://www.mdpi.com/2218-1997/7/2/30/pdf |
| article xml uploaded. | 8 February 2021 06:18 CET | Update | https://www.mdpi.com/2218-1997/7/2/30/xml |
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| article pdf uploaded. | 30 January 2021 08:20 CET | Version of Record | https://www.mdpi.com/2218-1997/7/2/30/pdf-vor |
