| article html file updated | 30 August 2025 20:51 CEST | Update | https://www.mdpi.com/2218-273X/9/6/221 |
| article html file updated | 21 August 2025 21:17 CEST | Update | - |
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| article html file updated | 27 June 2019 09:22 CEST | Original file | - |
| article pdf uploaded. | 27 June 2019 09:21 CEST | Updated version of record | https://www.mdpi.com/2218-273X/9/6/221/pdf |
| article xml uploaded. | 27 June 2019 09:21 CEST | Update | https://www.mdpi.com/2218-273X/9/6/221/xml |
| article xml file uploaded | 27 June 2019 09:21 CEST | Update | - |
| article pdf uploaded. | 6 June 2019 17:43 CEST | Version of Record | https://www.mdpi.com/2218-273X/9/6/221/pdf-vor |
| article xml file uploaded | 6 June 2019 17:43 CEST | Original file | - |
