| article html file updated | 15 August 2026 14:21 CEST | Update | https://www.mdpi.com/1996-1073/12/2/208 |
| article html file updated | 11 February 2020 07:50 CET | Update | N/A |
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| article html file updated | 10 January 2019 06:53 CET | Original file | N/A |
| article pdf uploaded. | 10 January 2019 06:52 CET | Version of Record | https://www.mdpi.com/1996-1073/12/2/208/pdf |
| article xml uploaded. | 10 January 2019 06:52 CET | Update | https://www.mdpi.com/1996-1073/12/2/208/xml |
| article xml file uploaded | 10 January 2019 06:52 CET | Original file | N/A |
