| article html file updated | 7 February 2020 02:02 CET | Update | https://www.mdpi.com/2073-4441/7/12/6669 |
| article html file updated | 6 May 2019 05:22 CEST | Update | - |
| article html file updated | 26 March 2019 16:10 CET | Original file | - |
| article pdf uploaded. | 10 December 2015 12:10 CET | Version of Record | https://www.mdpi.com/2073-4441/7/12/6669/pdf |
| article xml uploaded. | 10 December 2015 12:10 CET | Original file | https://www.mdpi.com/2073-4441/7/12/6669/xml |
