| article html file updated | 14 August 2026 17:09 CEST | Update | https://www.mdpi.com/1424-8220/17/9/1997 |
| article html file updated | 30 August 2025 01:05 CEST | Update | N/A |
| article html file updated | 16 July 2022 06:07 CEST | Update | N/A |
| article html file updated | 8 February 2020 14:58 CET | Update | N/A |
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| article html file updated | 30 September 2017 14:41 CEST | Update | N/A |
| article html file updated | 4 September 2017 05:07 CEST | Update | N/A |
| article xml uploaded. | 4 September 2017 05:06 CEST | Update | https://www.mdpi.com/1424-8220/17/9/1997/xml |
| article pdf uploaded. | 4 September 2017 05:06 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/9/1997/pdf |
| article html file updated | 31 August 2017 13:35 CEST | Original file | N/A |
| article xml uploaded. | 31 August 2017 13:33 CEST | Update | N/A |
| article xml uploaded. | 31 August 2017 13:33 CEST | Original file | N/A |
| article pdf uploaded. | 31 August 2017 13:33 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/9/1997/pdf-vor |
