| article html file updated | 29 August 2025 23:42 CEST | Update | https://www.mdpi.com/2218-1989/6/4/33 |
| article html file updated | 16 July 2022 03:30 CEST | Update | N/A |
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| article xml uploaded. | 10 October 2016 05:17 CEST | Original file | https://www.mdpi.com/2218-1989/6/4/33/xml |
| article pdf uploaded. | 10 October 2016 05:17 CEST | Updated version of record | https://www.mdpi.com/2218-1989/6/4/33/pdf |
| article pdf uploaded. | 3 October 2016 09:44 CEST | Version of Record | https://www.mdpi.com/2218-1989/6/4/33/pdf-vor |
