| article html file updated | 31 August 2025 05:38 CEST | Update | https://www.mdpi.com/2073-4468/8/4/55 |
| article html file updated | 19 July 2022 22:36 CEST | Update | - |
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| article pdf uploaded. | 19 December 2019 05:16 CET | Updated version of record | https://www.mdpi.com/2073-4468/8/4/55/pdf |
| article xml uploaded. | 19 December 2019 05:16 CET | Update | https://www.mdpi.com/2073-4468/8/4/55/xml |
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| article pdf uploaded. | 3 December 2019 14:43 CET | Version of Record | https://www.mdpi.com/2073-4468/8/4/55/pdf-vor |
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