| article html file updated | 6 February 2020 20:11 CET | Update | https://www.mdpi.com/2071-1050/7/7/8420 |
| article html file updated | 6 May 2019 16:45 CEST | Update | N/A |
| article html file updated | 26 March 2019 05:39 CET | Update | N/A |
| article html file updated | 21 August 2015 14:17 CEST | Update | N/A |
| article html file updated | 19 August 2015 10:09 CEST | Original file | N/A |
| article xml file uploaded | 19 August 2015 10:09 CEST | Original file | https://www.mdpi.com/2071-1050/7/7/8420/xml |
| article pdf uploaded. | 30 June 2015 12:11 CEST | Version of Record | https://www.mdpi.com/2071-1050/7/7/8420/pdf |
