| article html file updated | 30 August 2025 03:21 CEST | Update | https://www.mdpi.com/1996-1073/11/4/856 |
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| article xml uploaded. | 10 April 2018 12:56 CEST | Update | https://www.mdpi.com/1996-1073/11/4/856/xml |
| article pdf uploaded. | 10 April 2018 12:56 CEST | Updated version of record | https://www.mdpi.com/1996-1073/11/4/856/pdf |
| article pdf uploaded. | 5 April 2018 17:41 CEST | Version of Record | https://www.mdpi.com/1996-1073/11/4/856/pdf-vor |
