| article html file updated | 5 February 2020 22:02 CET | Update | https://www.mdpi.com/1999-4915/4/9/1651 |
| article html file updated | 8 May 2019 14:37 CEST | Update | N/A |
| article html file updated | 20 March 2019 12:41 CET | Update | N/A |
| article html file updated | 17 June 2015 02:25 CEST | Update | N/A |
| article html file updated | 14 August 2014 12:06 CEST | Update | N/A |
| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/1999-4915/4/9/1651/xml |
| article html file updated | 7 February 2013 15:07 CET | Update | N/A |
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| article html file updated | 6 February 2013 10:28 CET | Update | N/A |
| article html file updated | 29 January 2013 06:42 CET | Update | N/A |
| article html file updated | 24 January 2013 02:26 CET | Original file | N/A |
