| article html file updated | 6 February 2020 10:38 CET | Update | https://www.mdpi.com/2073-8994/6/3/578 | 
| article html file updated | 9 January 2020 06:06 CET | Update | - | 
| article html file updated | 20 September 2019 10:23 CEST | Update | - | 
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| article html file updated | 21 October 2014 03:42 CEST | Update | - | 
| article xml file uploaded | 21 October 2014 03:42 CEST | Update | https://www.mdpi.com/2073-8994/6/3/578/xml | 
| article html file updated | 21 October 2014 03:06 CEST | Original file | - | 
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| article pdf uploaded. | 11 July 2014 10:31 CEST | Version of Record | https://www.mdpi.com/2073-8994/6/3/578/pdf |