| article html file updated | 5 February 2020 18:57 CET | Update | https://www.mdpi.com/2072-4292/4/1/21 |
| article html file updated | 8 May 2019 21:20 CEST | Update | N/A |
| article html file updated | 25 March 2019 08:27 CET | Update | N/A |
| article html file updated | 16 June 2015 20:49 CEST | Update | N/A |
| article html file updated | 14 August 2014 12:04 CEST | Update | N/A |
| article xml file uploaded | 14 August 2014 12:04 CEST | Original file | https://www.mdpi.com/2072-4292/4/1/21/xml |
| article html file updated | 7 February 2013 09:27 CET | Update | N/A |
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| article html file updated | 6 February 2013 05:17 CET | Update | N/A |
| article html file updated | 29 January 2013 01:05 CET | Update | N/A |
| article html file updated | 26 January 2013 07:08 CET | Update | N/A |
| article html file updated | 23 January 2013 06:27 CET | Original file | N/A |
