| article html file updated | 17 August 2026 05:38 CEST | Update | https://www.mdpi.com/2227-7099/8/1/20 |
| article html file updated | 24 December 2025 17:56 CET | Update | N/A |
| article html file updated | 31 August 2025 14:14 CEST | Update | N/A |
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| article html file updated | 1 April 2020 22:09 CEST | Update | N/A |
| article html file updated | 26 March 2020 13:39 CET | Original file | N/A |
| article pdf uploaded. | 26 March 2020 13:37 CET | Updated version of record | https://www.mdpi.com/2227-7099/8/1/20/pdf |
| article xml uploaded. | 26 March 2020 13:37 CET | Update | https://www.mdpi.com/2227-7099/8/1/20/xml |
| article xml file uploaded | 26 March 2020 13:37 CET | Update | N/A |
| article pdf uploaded. | 12 March 2020 12:52 CET | Version of Record | https://www.mdpi.com/2227-7099/8/1/20/pdf-vor |
| article xml file uploaded | 12 March 2020 12:52 CET | Original file | N/A |
