| article html file updated | 5 February 2020 21:11 CET | Update | https://www.mdpi.com/2077-0375/2/3/415 |
| article html file updated | 8 May 2019 16:29 CEST | Update | N/A |
| article html file updated | 25 March 2019 12:47 CET | Update | N/A |
| article html file updated | 17 June 2015 01:02 CEST | Update | N/A |
| article html file updated | 18 March 2014 09:49 CET | Update | N/A |
| article xml file uploaded | 18 March 2014 09:49 CET | Original file | https://www.mdpi.com/2077-0375/2/3/415/xml |
| article html file updated | 7 February 2013 13:32 CET | Update | N/A |
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| article html file updated | 29 January 2013 05:19 CET | Update | N/A |
| article html file updated | 26 January 2013 12:03 CET | Update | N/A |
| article html file updated | 23 January 2013 21:56 CET | Original file | N/A |
