| article html file updated | 6 February 2020 16:00 CET | Update | https://www.mdpi.com/2071-1050/7/2/2145 |
| article html file updated | 7 May 2019 00:53 CEST | Update | - |
| article html file updated | 25 March 2019 21:51 CET | Update | - |
| article html file updated | 21 August 2015 07:44 CEST | Update | - |
| article html file updated | 28 February 2015 03:11 CET | Original file | - |
| article xml file uploaded | 28 February 2015 03:11 CET | Original file | https://www.mdpi.com/2071-1050/7/2/2145/xml |
| article pdf uploaded. | 16 February 2015 09:57 CET | Version of Record | https://www.mdpi.com/2071-1050/7/2/2145/pdf |
