| article html file updated | 6 February 2020 10:34 CET | Update | https://www.mdpi.com/2218-273X/4/3/646 |
| article html file updated | 21 March 2019 20:29 CET | Update | - |
| article html file updated | 14 March 2018 13:28 CET | Update | - |
| article html file updated | 20 August 2015 12:15 CEST | Update | - |
| article html file updated | 11 October 2014 03:50 CEST | Original file | - |
| article xml file uploaded | 11 October 2014 03:50 CEST | Original file | https://www.mdpi.com/2218-273X/4/3/646/xml |
| article pdf uploaded. | 9 July 2014 13:21 CEST | Version of Record | https://www.mdpi.com/2218-273X/4/3/646/pdf |
