| article html file updated | 29 August 2025 21:10 CEST | Update | https://www.mdpi.com/2227-7072/2/3/280 |
| article html file updated | 15 July 2022 23:14 CEST | Update | N/A |
| article html file updated | 6 February 2020 10:57 CET | Update | N/A |
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| article html file updated | 1 September 2014 11:20 CEST | Original file | N/A |
| article xml file uploaded | 1 September 2014 11:20 CEST | Original file | https://www.mdpi.com/2227-7072/2/3/280/xml |
| article pdf uploaded. | 28 July 2014 14:54 CEST | Updated version of record | https://www.mdpi.com/2227-7072/2/3/280/pdf |
| article pdf uploaded. | 23 July 2014 15:11 CEST | Version of Record | https://www.mdpi.com/2227-7072/2/3/280/pdf-vor |
