| article html file updated | 6 February 2020 02:19 CET | Update | https://www.mdpi.com/2218-1989/3/2/412 |
| article html file updated | 8 May 2019 04:43 CEST | Update | - |
| article html file updated | 20 March 2019 23:00 CET | Update | - |
| article html file updated | 17 June 2015 09:40 CEST | Update | - |
| article html file updated | 14 August 2014 12:04 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:04 CEST | Update | https://www.mdpi.com/2218-1989/3/2/412/xml |
| article html file updated | 7 January 2014 12:29 CET | Original file | - |
| article xml file uploaded | 7 January 2014 12:29 CET | Original file | - |
| article pdf uploaded. | 29 May 2013 16:13 CEST | Updated version of record | https://www.mdpi.com/2218-1989/3/2/412/pdf |
| article pdf uploaded. | 27 May 2013 13:45 CEST | Updated version of record | https://www.mdpi.com/2218-1989/3/2/412/pdf-vor |
| article pdf uploaded. | 24 May 2013 18:38 CEST | Version of Record | https://www.mdpi.com/2218-1989/3/2/412/pdf-vor |
