| article html file updated | 8 February 2020 11:03 CET | Update | https://www.mdpi.com/2077-0383/6/7/69 |
| article html file updated | 25 September 2019 23:02 CEST | Update | - |
| article html file updated | 3 May 2019 12:16 CEST | Update | - |
| article html file updated | 28 July 2017 11:49 CEST | Update | - |
| article html file updated | 14 July 2017 14:54 CEST | Update | - |
| article html file updated | 14 July 2017 14:53 CEST | Update | - |
| article html file updated | 14 July 2017 14:52 CEST | Original file | - |
| article xml uploaded. | 14 July 2017 14:51 CEST | Original file | https://www.mdpi.com/2077-0383/6/7/69/xml |
| article pdf uploaded. | 14 July 2017 14:51 CEST | Version of Record | https://www.mdpi.com/2077-0383/6/7/69/pdf |
