| article html file updated | 12 August 2026 17:48 CEST | Update | https://www.mdpi.com/1424-8247/6/2/251 |
| article html file updated | 6 February 2020 00:26 CET | Update | N/A |
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| article pdf uploaded. | 8 February 2013 14:01 CET | Updated version of record | https://www.mdpi.com/1424-8247/6/2/251/pdf |
| article pdf uploaded. | 6 February 2013 11:12 CET | Version of Record | https://www.mdpi.com/1424-8247/6/2/251/pdf-vor |
