| article html file updated | 6 February 2020 14:41 CET | Update | https://www.mdpi.com/2071-1050/7/1/35 |
| article html file updated | 7 May 2019 03:30 CEST | Update | N/A |
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| article html file updated | 20 January 2015 08:36 CET | Original file | N/A |
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| article pdf uploaded. | 29 December 2014 09:57 CET | Updated version of record | https://www.mdpi.com/2071-1050/7/1/35/pdf |
| article pdf uploaded. | 23 December 2014 13:54 CET | Version of Record | https://www.mdpi.com/2071-1050/7/1/35/pdf-vor |
