| article html file updated | 5 February 2020 21:32 CET | Update | https://www.mdpi.com/2079-7737/1/2/297 |
| article html file updated | 8 May 2019 15:44 CEST | Update | - |
| article html file updated | 25 March 2019 13:31 CET | Update | - |
| article html file updated | 17 June 2015 01:37 CEST | Update | - |
| article html file updated | 28 April 2014 10:23 CEST | Update | - |
| article xml file uploaded | 28 April 2014 10:23 CEST | Original file | https://www.mdpi.com/2079-7737/1/2/297/xml |
| article html file updated | 7 February 2013 14:16 CET | Update | - |
| article html file updated | 7 February 2013 05:21 CET | Update | - |
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| article html file updated | 29 January 2013 05:53 CET | Update | - |
| article html file updated | 26 January 2013 23:51 CET | Update | - |
| article html file updated | 23 January 2013 23:52 CET | Original file | - |
