| article html file updated | 31 August 2025 12:00 CEST | Update | https://www.mdpi.com/2218-1997/6/2/34 |
| article html file updated | 20 July 2022 20:31 CEST | Update | - |
| article html file updated | 6 March 2020 13:44 CET | Update | - |
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| article pdf uploaded. | 20 February 2020 15:48 CET | Updated version of record | https://www.mdpi.com/2218-1997/6/2/34/pdf |
| article xml uploaded. | 20 February 2020 15:48 CET | Update | https://www.mdpi.com/2218-1997/6/2/34/xml |
| article xml file uploaded | 20 February 2020 15:48 CET | Update | - |
| article pdf uploaded. | 18 February 2020 13:59 CET | Version of Record | https://www.mdpi.com/2218-1997/6/2/34/pdf-vor |
| article xml file uploaded | 18 February 2020 13:59 CET | Original file | - |
