| article html file updated | 6 February 2020 04:45 CET | Update | https://www.mdpi.com/2076-328X/3/4/541 |
| article html file updated | 20 September 2019 01:44 CEST | Update | N/A |
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| article xml file uploaded | 5 March 2015 11:18 CET | Update | https://www.mdpi.com/2076-328X/3/4/541/xml |
| article html file updated | 26 August 2014 03:57 CEST | Original file | N/A |
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| article pdf uploaded. | 9 October 2013 12:26 CEST | Version of Record | https://www.mdpi.com/2076-328X/3/4/541/pdf |