| article html file updated | 6 February 2020 10:57 CET | Update | https://www.mdpi.com/2076-0817/3/3/633 |
| article html file updated | 7 May 2019 11:07 CEST | Update | N/A |
| article html file updated | 21 March 2019 21:38 CET | Update | N/A |
| article html file updated | 20 August 2015 13:34 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/2076-0817/3/3/633/xml |
| article pdf uploaded. | 24 July 2014 10:26 CEST | Version of Record | https://www.mdpi.com/2076-0817/3/3/633/pdf |
