| article html file updated | 29 August 2025 23:32 CEST | Update | https://www.mdpi.com/1996-1073/9/9/681 |
| article html file updated | 16 July 2022 03:11 CEST | Update | N/A |
| article html file updated | 7 February 2020 13:52 CET | Update | N/A |
| article html file updated | 5 May 2019 06:07 CEST | Update | N/A |
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| article html file updated | 26 September 2016 11:45 CEST | Update | N/A |
| article html file updated | 25 August 2016 14:20 CEST | Original file | N/A |
| article xml uploaded. | 25 August 2016 14:18 CEST | Update | https://www.mdpi.com/1996-1073/9/9/681/xml |
| article xml uploaded. | 25 August 2016 14:18 CEST | Original file | N/A |
| article pdf uploaded. | 25 August 2016 14:18 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/9/681/pdf |
