| article html file updated | 6 February 2020 04:41 CET | Update | https://www.mdpi.com/2218-273X/3/4/733 |
| article html file updated | 7 May 2019 23:48 CEST | Update | - |
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| article html file updated | 14 March 2018 17:52 CET | Update | - |
| article html file updated | 17 June 2015 13:36 CEST | Update | - |
| article html file updated | 28 April 2014 10:35 CEST | Original file | - |
| article xml file uploaded | 28 April 2014 10:35 CEST | Original file | https://www.mdpi.com/2218-273X/3/4/733/xml |
| article pdf uploaded. | 30 September 2013 16:49 CEST | Version of Record | https://www.mdpi.com/2218-273X/3/4/733/pdf |
