| article xml uploaded. | 27 August 2019 22:53 CEST | Update | https://www.mdpi.com/1996-1073/7/3/1685/xml |
| article html file updated | 20 August 2015 00:44 CEST | Update | https://www.mdpi.com/1996-1073/7/3/1685 |
| article html file updated | 3 June 2014 12:14 CEST | Original file | - |
| article xml file uploaded | 3 June 2014 12:13 CEST | Original file | - |
| article pdf uploaded. | 21 March 2014 15:21 CET | Version of Record | https://www.mdpi.com/1996-1073/7/3/1685/pdf |
