| article html file updated | 6 February 2020 08:23 CET | Update | https://www.mdpi.com/2220-9964/3/2/540 |
| article html file updated | 7 May 2019 16:22 CEST | Update | - |
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| article html file updated | 20 August 2015 02:11 CEST | Update | - |
| article html file updated | 10 November 2014 07:33 CET | Original file | - |
| article xml file uploaded | 10 November 2014 07:33 CET | Original file | https://www.mdpi.com/2220-9964/3/2/540/xml |
| article pdf uploaded. | 3 April 2014 17:24 CEST | Version of Record | https://www.mdpi.com/2220-9964/3/2/540/pdf |
