| article html file updated | 24 December 2025 13:51 CET | Update | https://www.mdpi.com/2218-273X/6/1/6 |
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| article pdf uploaded. | 7 January 2016 10:29 CET | Updated version of record | https://www.mdpi.com/2218-273X/6/1/6/pdf |
| article xml uploaded. | 7 January 2016 10:29 CET | Update | https://www.mdpi.com/2218-273X/6/1/6/xml |
| article pdf uploaded. | 6 January 2016 14:27 CET | Version of Record | https://www.mdpi.com/2218-273X/6/1/6/pdf-vor |