| article html file updated | 6 February 2020 10:10 CET | Update | https://www.mdpi.com/1996-1944/7/6/4803 |
| article html file updated | 7 May 2019 12:42 CEST | Update | - |
| article html file updated | 21 March 2019 19:26 CET | Update | - |
| article html file updated | 20 August 2015 10:42 CEST | Update | - |
| article html file updated | 18 July 2014 04:28 CEST | Original file | - |
| article xml file uploaded | 18 July 2014 04:28 CEST | Original file | https://www.mdpi.com/1996-1944/7/6/4803/xml |
| article pdf uploaded. | 23 June 2014 13:58 CEST | Version of Record | https://www.mdpi.com/1996-1944/7/6/4803/pdf |
