| article html file updated | 7 February 2020 23:14 CET | Update | https://www.mdpi.com/2077-0383/6/2/17 |
| article html file updated | 23 September 2019 07:04 CEST | Update | - |
| article html file updated | 4 May 2019 11:34 CEST | Update | - |
| article html file updated | 2 March 2017 09:46 CET | Update | - |
| article html file updated | 13 February 2017 12:49 CET | Original file | - |
| article xml uploaded. | 13 February 2017 12:48 CET | Original file | https://www.mdpi.com/2077-0383/6/2/17/xml |
| article pdf uploaded. | 13 February 2017 12:48 CET | Version of Record | https://www.mdpi.com/2077-0383/6/2/17/pdf |
