| article html file updated | 29 August 2025 21:02 CEST | Update | https://www.mdpi.com/1999-5903/6/2/203 |
| article html file updated | 15 July 2022 23:00 CEST | Update | - |
| article html file updated | 6 February 2020 08:42 CET | Update | - |
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| article html file updated | 21 March 2019 15:45 CET | Original file | - |
| article pdf uploaded. | 23 April 2014 10:44 CEST | Updated version of record | https://www.mdpi.com/1999-5903/6/2/203/pdf |
| article pdf uploaded. | 17 April 2014 16:06 CEST | Version of Record | https://www.mdpi.com/1999-5903/6/2/203/pdf-vor |
