| article html file updated | 24 December 2025 14:16 CET | Update | https://www.mdpi.com/1996-1944/11/4/521 |
| article html file updated | 30 August 2025 03:15 CEST | Update | N/A |
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| article xml uploaded. | 4 April 2018 09:25 CEST | Update | https://www.mdpi.com/1996-1944/11/4/521/xml |
| article pdf uploaded. | 4 April 2018 09:25 CEST | Updated version of record | https://www.mdpi.com/1996-1944/11/4/521/pdf |
| article html file updated | 29 March 2018 15:42 CEST | Original file | N/A |
| article pdf uploaded. | 29 March 2018 15:40 CEST | Version of Record | https://www.mdpi.com/1996-1944/11/4/521/pdf-vor |