| article html file updated | 7 February 2020 22:36 CET | Update | https://www.mdpi.com/2072-6643/9/2/104 |
| article html file updated | 23 September 2019 03:28 CEST | Update | - |
| article html file updated | 4 May 2019 12:51 CEST | Update | - |
| article html file updated | 2 March 2017 03:43 CET | Update | - |
| article html file updated | 4 February 2017 05:56 CET | Original file | - |
| article pdf uploaded. | 3 February 2017 12:17 CET | Version of Record | https://www.mdpi.com/2072-6643/9/2/104/pdf |
