| article html file updated | 6 February 2020 02:04 CET | Update | https://www.mdpi.com/2218-273X/3/2/303 |
| article html file updated | 8 May 2019 05:14 CEST | Update | - |
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| article html file updated | 21 March 2018 08:25 CET | Update | - |
| article html file updated | 17 June 2015 09:17 CEST | Update | - |
| article html file updated | 28 April 2014 10:33 CEST | Original file | - |
| article xml file uploaded | 28 April 2014 10:33 CEST | Original file | https://www.mdpi.com/2218-273X/3/2/303/xml |
| article pdf uploaded. | 14 May 2013 16:40 CEST | Version of Record | https://www.mdpi.com/2218-273X/3/2/303/pdf |
