| article html file updated | 5 February 2020 20:14 CET | Update | https://www.mdpi.com/2073-4409/1/2/51 |
| article html file updated | 8 May 2019 18:34 CEST | Update | - |
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| article html file updated | 16 June 2015 23:30 CEST | Update | - |
| article html file updated | 30 August 2013 09:04 CEST | Update | - |
| article xml file uploaded | 30 August 2013 09:04 CEST | Original file | https://www.mdpi.com/2073-4409/1/2/51/xml |
| article html file updated | 7 February 2013 12:00 CET | Update | - |
| article html file updated | 7 February 2013 01:59 CET | Update | - |
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| article html file updated | 26 January 2013 10:03 CET | Update | - |
| article html file updated | 23 January 2013 16:25 CET | Original file | - |
