| article html file updated | 6 February 2020 08:47 CET | Update | https://www.mdpi.com/2227-7102/4/2/172 |
| article html file updated | 7 May 2019 15:30 CEST | Update | - |
| article html file updated | 21 March 2019 15:59 CET | Update | - |
| article html file updated | 20 August 2015 04:16 CEST | Update | - |
| article html file updated | 14 August 2014 11:41 CEST | Update | - |
| article xml file uploaded | 14 August 2014 11:41 CEST | Update | https://www.mdpi.com/2227-7102/4/2/172/xml |
| article html file updated | 14 August 2014 11:21 CEST | Original file | - |
| article xml file uploaded | 14 August 2014 11:21 CEST | Original file | - |
| article pdf uploaded. | 22 April 2014 15:47 CEST | Version of Record | https://www.mdpi.com/2227-7102/4/2/172/pdf |
