| article html file updated | 31 August 2025 07:52 CEST | Update | https://www.mdpi.com/2218-1997/6/1/8 |
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| article pdf uploaded. | 10 January 2020 11:46 CET | Updated version of record | https://www.mdpi.com/2218-1997/6/1/8/pdf |
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| article pdf uploaded. | 31 December 2019 10:47 CET | Version of Record | https://www.mdpi.com/2218-1997/6/1/8/pdf-vor |
| article xml file uploaded | 31 December 2019 10:47 CET | Original file | - |
