| article html file updated | 30 August 2025 12:56 CEST | Update | https://www.mdpi.com/1996-1073/12/6/971 |
| article html file updated | 19 July 2022 16:18 CEST | Update | N/A |
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| article html file updated | 13 March 2019 09:37 CET | Original file | N/A |
| article pdf uploaded. | 13 March 2019 09:36 CET | Version of Record | https://www.mdpi.com/1996-1073/12/6/971/pdf |
| article xml uploaded. | 13 March 2019 09:36 CET | Update | https://www.mdpi.com/1996-1073/12/6/971/xml |
| article xml file uploaded | 13 March 2019 09:36 CET | Original file | N/A |
