| article html file updated | 29 August 2025 21:04 CEST | Update | https://www.mdpi.com/2218-1989/4/2/394 |
| article html file updated | 15 July 2022 23:04 CEST | Update | N/A |
| article html file updated | 6 February 2020 09:27 CET | Update | N/A |
| article html file updated | 7 May 2019 14:10 CEST | Update | N/A |
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| article html file updated | 18 July 2014 03:57 CEST | Update | N/A |
| article xml file uploaded | 18 July 2014 03:57 CEST | Update | https://www.mdpi.com/2218-1989/4/2/394/xml |
| article html file updated | 27 June 2014 06:43 CEST | Original file | N/A |
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| article pdf uploaded. | 26 May 2014 08:29 CEST | Updated version of record | https://www.mdpi.com/2218-1989/4/2/394/pdf |
| article pdf uploaded. | 23 May 2014 09:36 CEST | Version of Record | https://www.mdpi.com/2218-1989/4/2/394/pdf-vor |
