| article html file updated | 6 February 2020 08:17 CET | Update | https://www.mdpi.com/1996-1073/7/4/2146 |
| article html file updated | 9 January 2020 04:30 CET | Update | - |
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| article html file updated | 16 June 2014 09:13 CEST | Original file | - |
| article xml file uploaded | 16 June 2014 09:13 CEST | Original file | https://www.mdpi.com/1996-1073/7/4/2146/xml |
| article pdf uploaded. | 1 April 2014 10:23 CEST | Version of Record | https://www.mdpi.com/1996-1073/7/4/2146/pdf |
