| article html file updated | 30 August 2025 11:15 CEST | Update | https://www.mdpi.com/1996-1073/12/2/309 |
| article html file updated | 20 July 2022 16:54 CEST | Update | - |
| article html file updated | 11 February 2020 10:13 CET | Update | - |
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| article xml uploaded. | 24 January 2019 02:13 CET | Update | https://www.mdpi.com/1996-1073/12/2/309/xml |
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| article pdf uploaded. | 24 January 2019 02:13 CET | Updated version of record | https://www.mdpi.com/1996-1073/12/2/309/pdf |
| article html file updated | 19 January 2019 10:56 CET | Original file | - |
| article pdf uploaded. | 19 January 2019 10:54 CET | Version of Record | https://www.mdpi.com/1996-1073/12/2/309/pdf-vor |
| article xml uploaded. | 19 January 2019 10:54 CET | Update | - |
| article xml file uploaded | 19 January 2019 10:54 CET | Original file | - |
