| article html file updated | 6 February 2020 20:11 CET | Update | https://www.mdpi.com/1996-1073/8/7/6641 |
| article html file updated | 6 May 2019 16:46 CEST | Update | - |
| article html file updated | 26 March 2019 05:39 CET | Update | - |
| article html file updated | 21 August 2015 14:16 CEST | Update | - |
| article html file updated | 10 August 2015 12:31 CEST | Original file | - |
| article xml file uploaded | 10 August 2015 12:31 CEST | Original file | https://www.mdpi.com/1996-1073/8/7/6641/xml |
| article pdf uploaded. | 30 June 2015 11:20 CEST | Version of Record | https://www.mdpi.com/1996-1073/8/7/6641/pdf |
