| article html file updated | 30 August 2025 10:36 CEST | Update | https://www.mdpi.com/2227-9717/7/1/20 |
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| article pdf uploaded. | 7 January 2019 07:59 CET | Updated version of record | https://www.mdpi.com/2227-9717/7/1/20/pdf |
| article html file updated | 4 January 2019 11:00 CET | Original file | - |
| article pdf uploaded. | 4 January 2019 10:59 CET | Version of Record | https://www.mdpi.com/2227-9717/7/1/20/pdf-vor |
| article xml uploaded. | 4 January 2019 10:59 CET | Update | https://www.mdpi.com/2227-9717/7/1/20/xml |
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