| article html file updated | 31 August 2025 02:54 CEST | Update | https://www.mdpi.com/2227-9709/6/4/45 |
| article html file updated | 20 July 2022 01:38 CEST | Update | - |
| article html file updated | 14 February 2020 00:50 CET | Update | - |
| article html file updated | 31 December 2019 08:51 CET | Update | - |
| article html file updated | 25 October 2019 13:47 CEST | Original file | - |
| article pdf uploaded. | 25 October 2019 13:46 CEST | Updated version of record | https://www.mdpi.com/2227-9709/6/4/45/pdf |
| article xml uploaded. | 25 October 2019 13:46 CEST | Update | https://www.mdpi.com/2227-9709/6/4/45/xml |
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| article pdf uploaded. | 14 October 2019 17:27 CEST | Version of Record | https://www.mdpi.com/2227-9709/6/4/45/pdf-vor |
| article xml file uploaded | 14 October 2019 17:27 CEST | Original file | - |
