| article html file updated | 30 August 2025 10:45 CEST | Update | https://www.mdpi.com/2227-9067/6/1/7 |
| article html file updated | 17 July 2022 21:54 CEST | Update | - |
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| article xml uploaded. | 4 February 2019 04:50 CET | Update | https://www.mdpi.com/2227-9067/6/1/7/xml |
| article pdf uploaded. | 4 February 2019 04:50 CET | Updated version of record | https://www.mdpi.com/2227-9067/6/1/7/pdf |
| article html file updated | 11 January 2019 11:16 CET | Original file | - |
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| article pdf uploaded. | 8 January 2019 17:57 CET | Updated version of record | https://www.mdpi.com/2227-9067/6/1/7/pdf-vor |
| article xml file uploaded | 8 January 2019 17:52 CET | Original file | - |
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