| article html file updated | 30 August 2025 00:26 CEST | Update | https://www.mdpi.com/1999-4907/8/2/47 |
| article html file updated | 16 July 2022 04:55 CEST | Update | - |
| article html file updated | 7 February 2020 23:39 CET | Update | - |
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| article xml uploaded. | 17 February 2017 14:00 CET | Update | https://www.mdpi.com/1999-4907/8/2/47/xml |
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| article pdf uploaded. | 17 February 2017 14:00 CET | Version of Record | https://www.mdpi.com/1999-4907/8/2/47/pdf |
