| article html file updated | 7 February 2020 21:50 CET | Update | https://www.mdpi.com/2073-8994/9/1/13 |
| article html file updated | 22 September 2019 23:26 CEST | Update | N/A |
| article html file updated | 4 May 2019 14:23 CEST | Update | N/A |
| article html file updated | 7 February 2017 22:51 CET | Original file | N/A |
| article pdf uploaded. | 20 January 2017 14:23 CET | Version of Record | https://www.mdpi.com/2073-8994/9/1/13/pdf |
