| article html file updated | 31 August 2025 09:51 CEST | Update | https://www.mdpi.com/1424-8247/13/2/21 |
| article html file updated | 20 July 2022 18:22 CEST | Update | N/A |
| article html file updated | 6 March 2020 07:00 CET | Update | N/A |
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| article pdf uploaded. | 24 January 2020 07:50 CET | Version of Record | https://www.mdpi.com/1424-8247/13/2/21/pdf |
| article xml uploaded. | 24 January 2020 07:50 CET | Update | https://www.mdpi.com/1424-8247/13/2/21/xml |
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