| article html file updated | 31 August 2025 15:17 CEST | Update | https://www.mdpi.com/2410-390X/4/1/9 |
| article html file updated | 20 July 2022 23:47 CEST | Update | N/A |
| article html file updated | 23 March 2020 17:28 CET | Original file | N/A |
| article pdf uploaded. | 23 March 2020 17:27 CET | Updated version of record | https://www.mdpi.com/2410-390X/4/1/9/pdf |
| article xml uploaded. | 23 March 2020 17:27 CET | Update | https://www.mdpi.com/2410-390X/4/1/9/xml |
| article xml file uploaded | 23 March 2020 17:26 CET | Update | N/A |
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