| article html file updated | 7 February 2020 14:38 CET | Update | https://www.mdpi.com/2076-3417/6/9/251 |
| article html file updated | 5 May 2019 04:44 CEST | Update | - |
| article html file updated | 27 September 2016 08:06 CEST | Update | - |
| article html file updated | 8 September 2016 10:54 CEST | Original file | - |
| article xml uploaded. | 8 September 2016 10:53 CEST | Update | https://www.mdpi.com/2076-3417/6/9/251/xml |
| article xml uploaded. | 8 September 2016 10:53 CEST | Original file | - |
| article pdf uploaded. | 8 September 2016 10:53 CEST | Version of Record | https://www.mdpi.com/2076-3417/6/9/251/pdf |
