| article html file updated | 31 August 2025 07:29 CEST | Update | https://www.mdpi.com/2227-9032/8/1/7 |
| article html file updated | 19 July 2022 20:48 CEST | Update | - |
| article html file updated | 1 April 2020 10:46 CEST | Update | - |
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| article pdf uploaded. | 3 January 2020 10:57 CET | Updated version of record | https://www.mdpi.com/2227-9032/8/1/7/pdf |
| article xml uploaded. | 3 January 2020 10:57 CET | Update | https://www.mdpi.com/2227-9032/8/1/7/xml |
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| article pdf uploaded. | 25 December 2019 15:22 CET | Version of Record | https://www.mdpi.com/2227-9032/8/1/7/pdf-vor |
| article xml file uploaded | 25 December 2019 15:22 CET | Original file | - |
