| article html file updated | 6 February 2020 10:15 CET | Update | https://www.mdpi.com/2076-0817/3/3/499 |
| article html file updated | 20 September 2019 09:44 CEST | Update | N/A |
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| article html file updated | 21 March 2019 19:39 CET | Update | N/A |
| article html file updated | 20 August 2015 10:59 CEST | Update | N/A |
| article html file updated | 18 November 2014 07:56 CET | Original file | N/A |
| article xml file uploaded | 18 November 2014 07:56 CET | Original file | https://www.mdpi.com/2076-0817/3/3/499/xml |
| article pdf uploaded. | 25 June 2014 14:10 CEST | Version of Record | https://www.mdpi.com/2076-0817/3/3/499/pdf |
