| article html file updated | 6 February 2020 01:48 CET | Update | https://www.mdpi.com/1424-8247/6/5/623 |
| article html file updated | 8 May 2019 05:44 CEST | Update | - |
| article html file updated | 20 March 2019 21:48 CET | Update | - |
| article html file updated | 17 June 2015 08:53 CEST | Update | - |
| article html file updated | 14 August 2014 12:04 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:04 CEST | Update | https://www.mdpi.com/1424-8247/6/5/623/xml |
| article html file updated | 13 September 2013 17:19 CEST | Original file | - |
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| article pdf uploaded. | 29 April 2013 10:03 CEST | Version of Record | https://www.mdpi.com/1424-8247/6/5/623/pdf |
