| article html file updated | 6 February 2020 05:11 CET | Update | https://www.mdpi.com/2076-393X/1/4/481 |
| article html file updated | 7 May 2019 22:47 CEST | Update | - |
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| article html file updated | 17 June 2015 14:18 CEST | Update | - |
| article html file updated | 16 December 2014 04:58 CET | Original file | - |
| article xml file uploaded | 16 December 2014 04:58 CET | Original file | https://www.mdpi.com/2076-393X/1/4/481/xml |
| article pdf uploaded. | 28 October 2013 09:45 CET | Version of Record | https://www.mdpi.com/2076-393X/1/4/481/pdf |
