| article html file updated | 30 August 2025 10:12 CEST | Update | https://www.mdpi.com/1996-1073/12/1/6 |
| article html file updated | 17 July 2022 17:35 CEST | Update | - |
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| article html file updated | 25 December 2018 10:04 CET | Original file | - |
| article pdf uploaded. | 25 December 2018 10:03 CET | Updated version of record | https://www.mdpi.com/1996-1073/12/1/6/pdf |
| article xml uploaded. | 25 December 2018 10:03 CET | Update | https://www.mdpi.com/1996-1073/12/1/6/xml |
| article xml file uploaded | 25 December 2018 10:03 CET | Update | - |
| article pdf uploaded. | 20 December 2018 18:30 CET | Updated version of record | https://www.mdpi.com/1996-1073/12/1/6/pdf-vor |
| article pdf uploaded. | 20 December 2018 18:27 CET | Version of Record | https://www.mdpi.com/1996-1073/12/1/6/pdf-vor |
| article xml file uploaded | 20 December 2018 18:27 CET | Original file | - |
