| article html file updated | 6 February 2020 10:05 CET | Update | https://www.mdpi.com/2218-1989/4/2/453 |
| article html file updated | 7 May 2019 12:51 CEST | Update | - |
| article html file updated | 21 March 2019 19:13 CET | Update | - |
| article html file updated | 20 August 2015 10:27 CEST | Update | - |
| article html file updated | 18 July 2014 03:57 CEST | Original file | - |
| article xml file uploaded | 18 July 2014 03:57 CEST | Original file | https://www.mdpi.com/2218-1989/4/2/453/xml |
| article pdf uploaded. | 19 June 2014 13:42 CEST | Version of Record | https://www.mdpi.com/2218-1989/4/2/453/pdf |
