| article html file updated | 29 August 2025 20:48 CEST | Update | https://www.mdpi.com/2077-0472/3/4/684 |
| article html file updated | 15 July 2022 22:37 CEST | Update | N/A |
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| article html file updated | 17 June 2015 13:55 CEST | Original file | N/A |
| article pdf uploaded. | 16 October 2013 17:27 CEST | Updated version of record | https://www.mdpi.com/2077-0472/3/4/684/pdf |
| article pdf uploaded. | 15 October 2013 16:44 CEST | Version of Record | https://www.mdpi.com/2077-0472/3/4/684/pdf-vor |
