| article html file updated | 25 December 2025 01:13 CET | Update | https://www.mdpi.com/2218-1997/7/1/6 |
| article html file updated | 1 September 2025 17:26 CEST | Update | N/A |
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| article html file updated | 31 December 2020 05:47 CET | Original file | N/A |
| article pdf uploaded. | 31 December 2020 05:46 CET | Version of Record | https://www.mdpi.com/2218-1997/7/1/6/pdf |
| article xml uploaded. | 31 December 2020 05:46 CET | Update | https://www.mdpi.com/2218-1997/7/1/6/xml |
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