| article html file updated | 15 August 2026 00:45 CEST | Update | https://www.mdpi.com/1996-1073/11/4/991 |
| article html file updated | 30 August 2025 03:34 CEST | Update | N/A |
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| article pdf uploaded. | 21 January 2019 08:01 CET | Updated version of record | https://www.mdpi.com/1996-1073/11/4/991/pdf |
| article html file updated | 1 May 2018 09:54 CEST | Update | N/A |
| article html file updated | 19 April 2018 13:11 CEST | Original file | N/A |
| article pdf uploaded. | 19 April 2018 13:09 CEST | Version of Record | https://www.mdpi.com/1996-1073/11/4/991/pdf-vor |
| article xml uploaded. | 19 April 2018 13:09 CEST | Update | https://www.mdpi.com/1996-1073/11/4/991/xml |
| article xml file uploaded | 19 April 2018 13:09 CEST | Original file | N/A |
