| article html file updated | 15 August 2026 12:09 CEST | Update | https://www.mdpi.com/2410-387X/2/4/38 |
| article html file updated | 30 August 2025 09:36 CEST | Update | N/A |
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| article html file updated | 12 December 2018 05:56 CET | Original file | N/A |
| article pdf uploaded. | 12 December 2018 05:55 CET | Updated version of record | https://www.mdpi.com/2410-387X/2/4/38/pdf |
| article xml uploaded. | 12 December 2018 05:55 CET | Update | https://www.mdpi.com/2410-387X/2/4/38/xml |
| article xml file uploaded | 12 December 2018 05:55 CET | Update | N/A |
| article pdf uploaded. | 5 December 2018 13:25 CET | Updated version of record | https://www.mdpi.com/2410-387X/2/4/38/pdf-vor |
| article pdf uploaded. | 5 December 2018 13:12 CET | Version of Record | https://www.mdpi.com/2410-387X/2/4/38/pdf-vor |
| article xml file uploaded | 5 December 2018 13:12 CET | Original file | N/A |
