| article html file updated | 30 August 2025 20:36 CEST | Update | https://www.mdpi.com/2218-1997/5/6/134 |
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| article pdf uploaded. | 24 June 2019 05:00 CEST | Updated version of record | https://www.mdpi.com/2218-1997/5/6/134/pdf |
| article xml uploaded. | 24 June 2019 05:00 CEST | Update | https://www.mdpi.com/2218-1997/5/6/134/xml |
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| article pdf uploaded. | 1 June 2019 10:51 CEST | Version of Record | https://www.mdpi.com/2218-1997/5/6/134/pdf-vor |
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