| article html file updated | 29 August 2025 22:34 CEST | Update | https://www.mdpi.com/1996-1073/9/1/33 |
| article html file updated | 16 July 2022 01:34 CEST | Update | N/A |
| article html file updated | 7 February 2020 03:09 CET | Update | N/A |
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| article html file updated | 26 March 2019 17:55 CET | Original file | N/A |
| article pdf uploaded. | 20 January 2016 12:51 CET | Updated version of record | https://www.mdpi.com/1996-1073/9/1/33/pdf |
| article pdf uploaded. | 7 January 2016 14:35 CET | Version of Record | https://www.mdpi.com/1996-1073/9/1/33/pdf-vor |
| article xml uploaded. | 7 January 2016 14:35 CET | Original file | https://www.mdpi.com/1996-1073/9/1/33/xml |
