| article html file updated | 23 October 2025 06:19 CEST | Update | https://www.mdpi.com/2076-2615/3/4/1021 |
| article html file updated | 6 February 2020 05:17 CET | Update | N/A |
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| article html file updated | 2 July 2015 06:37 CEST | Original file | N/A |
| article xml file uploaded | 2 July 2015 06:37 CEST | Original file | https://www.mdpi.com/2076-2615/3/4/1021/xml |
| article pdf uploaded. | 31 October 2013 14:31 CET | Version of Record | https://www.mdpi.com/2076-2615/3/4/1021/pdf |
