| article html file updated | 30 August 2025 02:08 CEST | Update | https://www.mdpi.com/2218-1997/4/1/5 |
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| article xml uploaded. | 3 January 2018 11:02 CET | Original file | https://www.mdpi.com/2218-1997/4/1/5/xml |
| article pdf uploaded. | 3 January 2018 11:02 CET | Updated version of record | https://www.mdpi.com/2218-1997/4/1/5/pdf |
| article pdf uploaded. | 1 January 2018 11:40 CET | Version of Record | https://www.mdpi.com/2218-1997/4/1/5/pdf-vor |
