| article html file updated | 6 February 2020 08:51 CET | Update | https://www.mdpi.com/2073-8994/6/2/308 |
| article html file updated | 7 May 2019 15:23 CEST | Update | N/A |
| article html file updated | 21 March 2019 16:07 CET | Update | N/A |
| article html file updated | 20 August 2015 04:29 CEST | Update | N/A |
| article html file updated | 18 July 2014 04:40 CEST | Original file | N/A |
| article xml file uploaded | 18 July 2014 04:40 CEST | Original file | https://www.mdpi.com/2073-8994/6/2/308/xml |
| article pdf uploaded. | 24 April 2014 11:02 CEST | Version of Record | https://www.mdpi.com/2073-8994/6/2/308/pdf |
