| article html file updated | 31 August 2025 16:24 CEST | Update | https://www.mdpi.com/2227-7072/8/2/21 |
| article html file updated | 21 July 2022 00:54 CEST | Update | N/A |
| article html file updated | 17 April 2020 05:27 CEST | Original file | N/A |
| article pdf uploaded. | 17 April 2020 05:25 CEST | Updated version of record | https://www.mdpi.com/2227-7072/8/2/21/pdf |
| article xml uploaded. | 17 April 2020 05:25 CEST | Update | https://www.mdpi.com/2227-7072/8/2/21/xml |
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| article pdf uploaded. | 3 April 2020 14:07 CEST | Version of Record | https://www.mdpi.com/2227-7072/8/2/21/pdf-vor |
| article xml file uploaded | 3 April 2020 14:07 CEST | Original file | N/A |
