| article html file updated | 5 February 2020 19:02 CET | Update | https://www.mdpi.com/1422-0067/13/1/552 |
| article html file updated | 19 September 2019 07:39 CEST | Update | N/A |
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| article html file updated | 14 August 2014 12:05 CEST | Update | N/A |
| article xml file uploaded | 14 August 2014 12:05 CEST | Original file | https://www.mdpi.com/1422-0067/13/1/552/xml |
| article html file updated | 7 February 2013 09:37 CET | Update | N/A |
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| article html file updated | 26 January 2013 07:20 CET | Update | N/A |
| article html file updated | 23 January 2013 07:01 CET | Original file | N/A |
