| article html file updated | 7 February 2020 12:08 CET | Update | https://www.mdpi.com/2073-4344/6/7/109 |
| article html file updated | 5 May 2019 09:22 CEST | Update | - |
| article html file updated | 27 March 2019 11:06 CET | Update | - |
| article html file updated | 28 July 2016 09:34 CEST | Update | - |
| article html file updated | 22 July 2016 11:06 CEST | Original file | - |
| article xml uploaded. | 22 July 2016 11:05 CEST | Original file | https://www.mdpi.com/2073-4344/6/7/109/xml |
| article pdf uploaded. | 22 July 2016 11:05 CEST | Version of Record | https://www.mdpi.com/2073-4344/6/7/109/pdf |
