| article html file updated | 6 February 2020 02:31 CET | Update | https://www.mdpi.com/2218-1989/3/2/484 |
| article html file updated | 8 May 2019 04:18 CEST | Update | - |
| article html file updated | 20 March 2019 23:30 CET | Update | - |
| article html file updated | 17 June 2015 10:02 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/2218-1989/3/2/484/xml |
| article html file updated | 7 January 2014 12:30 CET | Original file | - |
| article xml file uploaded | 7 January 2014 12:30 CET | Original file | - |
| article pdf uploaded. | 6 June 2013 09:59 CEST | Version of Record | https://www.mdpi.com/2218-1989/3/2/484/pdf |
