| article html file updated | 6 February 2020 06:09 CET | Update | https://www.mdpi.com/2079-6374/3/4/419 |
| article html file updated | 7 May 2019 20:56 CEST | Update | - |
| article html file updated | 21 March 2019 09:19 CET | Update | - |
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| article xml file uploaded | 26 August 2014 04:00 CEST | Update | https://www.mdpi.com/2079-6374/3/4/419/xml |
| article html file updated | 19 December 2013 09:10 CET | Original file | - |
| article xml uploaded. | 19 December 2013 09:10 CET | Original file | - |
| article pdf uploaded. | 19 December 2013 09:10 CET | Updated version of record | https://www.mdpi.com/2079-6374/3/4/419/pdf |
| article pdf uploaded. | 12 December 2013 16:43 CET | Version of Record | https://www.mdpi.com/2079-6374/3/4/419/pdf-vor |
