| article html file updated | 31 August 2025 07:59 CEST | Update | https://www.mdpi.com/2227-9717/8/1/50 |
| article html file updated | 19 July 2022 20:19 CEST | Update | - |
| article html file updated | 14 February 2020 23:24 CET | Update | - |
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| article pdf uploaded. | 3 January 2020 10:49 CET | Updated version of record | https://www.mdpi.com/2227-9717/8/1/50/pdf |
| article xml uploaded. | 3 January 2020 10:49 CET | Update | https://www.mdpi.com/2227-9717/8/1/50/xml |
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| article pdf uploaded. | 1 January 2020 11:19 CET | Version of Record | https://www.mdpi.com/2227-9717/8/1/50/pdf-vor |
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