| article html file updated | 31 August 2025 07:35 CEST | Update | https://www.mdpi.com/1999-4915/12/1/31 |
| article html file updated | 19 July 2022 20:43 CEST | Update | - |
| article html file updated | 14 February 2020 22:02 CET | Update | - |
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| article pdf uploaded. | 8 January 2020 07:58 CET | Updated version of record | https://www.mdpi.com/1999-4915/12/1/31/pdf |
| article xml uploaded. | 8 January 2020 07:58 CET | Update | https://www.mdpi.com/1999-4915/12/1/31/xml |
| article xml file uploaded | 8 January 2020 07:58 CET | Update | - |
| article html file updated | 27 December 2019 08:42 CET | Original file | - |
| article pdf uploaded. | 27 December 2019 08:41 CET | Version of Record | https://www.mdpi.com/1999-4915/12/1/31/pdf-vor |
| article xml uploaded. | 27 December 2019 08:41 CET | Update | - |
| article xml file uploaded | 27 December 2019 08:41 CET | Original file | - |
