| article html file updated | 29 August 2025 22:05 CEST | Update | https://www.mdpi.com/2218-1997/1/2/239 |
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| article xml file uploaded | 2 November 2015 10:51 CET | Original file | https://www.mdpi.com/2218-1997/1/2/239/xml |
| article pdf uploaded. | 3 September 2015 09:10 CEST | Updated version of record | https://www.mdpi.com/2218-1997/1/2/239/pdf |
| article pdf uploaded. | 2 September 2015 17:05 CEST | Updated version of record | https://www.mdpi.com/2218-1997/1/2/239/pdf-vor |
| article pdf uploaded. | 2 September 2015 17:04 CEST | Version of Record | https://www.mdpi.com/2218-1997/1/2/239/pdf-vor |
