| article html file updated | 7 February 2020 20:44 CET | Update | https://www.mdpi.com/2077-0383/6/1/3 |
| article html file updated | 22 September 2019 17:38 CEST | Update | - |
| article html file updated | 4 May 2019 16:54 CEST | Update | - |
| article html file updated | 7 February 2017 12:22 CET | Update | - |
| article html file updated | 4 January 2017 08:42 CET | Original file | - |
| article xml uploaded. | 4 January 2017 08:41 CET | Original file | https://www.mdpi.com/2077-0383/6/1/3/xml |
| article pdf uploaded. | 4 January 2017 08:41 CET | Version of Record | https://www.mdpi.com/2077-0383/6/1/3/pdf |
