| article html file updated | 30 August 2025 03:32 CEST | Update | https://www.mdpi.com/2227-7099/6/2/27 |
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| article xml uploaded. | 19 April 2018 13:52 CEST | Original file | https://www.mdpi.com/2227-7099/6/2/27/xml |
| article pdf uploaded. | 19 April 2018 13:52 CEST | Updated version of record | https://www.mdpi.com/2227-7099/6/2/27/pdf |
| article pdf uploaded. | 17 April 2018 16:52 CEST | Version of Record | https://www.mdpi.com/2227-7099/6/2/27/pdf-vor |
