| article html file updated | 1 September 2025 07:23 CEST | Update | https://www.mdpi.com/2227-9067/7/9/121 |
| article html file updated | 22 July 2022 05:47 CEST | Update | N/A |
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| article pdf uploaded. | 3 September 2020 06:13 CEST | Updated version of record | https://www.mdpi.com/2227-9067/7/9/121/pdf |
| article xml uploaded. | 3 September 2020 06:13 CEST | Update | https://www.mdpi.com/2227-9067/7/9/121/xml |
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