| article html file updated | 6 February 2020 02:31 CET | Update | https://www.mdpi.com/2218-1989/3/2/484 |
| article html file updated | 8 May 2019 04:18 CEST | Update | - |
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| article xml file uploaded | 14 August 2014 12:04 CEST | Update | https://www.mdpi.com/2218-1989/3/2/484/xml |
| article html file updated | 7 January 2014 12:30 CET | Original file | - |
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| article pdf uploaded. | 6 June 2013 09:59 CEST | Version of Record | https://www.mdpi.com/2218-1989/3/2/484/pdf |