| article html file updated | 6 February 2020 09:16 CET | Update | https://www.mdpi.com/2218-1989/4/2/373 |
| article html file updated | 7 May 2019 14:29 CEST | Update | - |
| article html file updated | 21 March 2019 17:07 CET | Update | - |
| article html file updated | 20 August 2015 07:10 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/2218-1989/4/2/373/xml |
| article pdf uploaded. | 15 May 2014 13:38 CEST | Version of Record | https://www.mdpi.com/2218-1989/4/2/373/pdf |
