| article html file updated | 19 August 2026 05:14 CEST | Update | https://www.mdpi.com/2218-1997/7/4/81 |
| article html file updated | 25 December 2025 07:02 CET | Update | N/A |
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| article html file updated | 29 March 2021 09:55 CEST | Original file | N/A |
| article pdf uploaded. | 29 March 2021 09:54 CEST | Updated version of record | https://www.mdpi.com/2218-1997/7/4/81/pdf |
| article xml uploaded. | 29 March 2021 09:54 CEST | Update | https://www.mdpi.com/2218-1997/7/4/81/xml |
| article xml file uploaded | 29 March 2021 09:54 CEST | Original file | N/A |
| article pdf uploaded. | 28 March 2021 15:53 CEST | Version of Record | https://www.mdpi.com/2218-1997/7/4/81/pdf-vor |
