| article html file updated | 31 August 2025 06:52 CEST | Update | https://www.mdpi.com/1422-0067/21/1/9 |
| article html file updated | 19 July 2022 21:24 CEST | Update | N/A |
| article html file updated | 14 February 2020 19:43 CET | Update | N/A |
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| article html file updated | 25 December 2019 11:43 CET | Original file | N/A |
| article pdf uploaded. | 25 December 2019 11:42 CET | Updated version of record | https://www.mdpi.com/1422-0067/21/1/9/pdf |
| article xml uploaded. | 25 December 2019 11:42 CET | Update | https://www.mdpi.com/1422-0067/21/1/9/xml |
| article xml file uploaded | 25 December 2019 11:42 CET | Update | N/A |
| article pdf uploaded. | 18 December 2019 12:25 CET | Version of Record | https://www.mdpi.com/1422-0067/21/1/9/pdf-vor |
| article xml file uploaded | 18 December 2019 12:25 CET | Original file | N/A |
