| article html file updated | 7 February 2020 22:23 CET | Update | https://www.mdpi.com/2072-6643/9/2/90 |
| article html file updated | 23 September 2019 02:25 CEST | Update | - |
| article html file updated | 4 May 2019 13:16 CEST | Update | - |
| article html file updated | 2 March 2017 03:37 CET | Update | - |
| article html file updated | 28 January 2017 10:45 CET | Original file | - |
| article xml uploaded. | 28 January 2017 10:44 CET | Original file | https://www.mdpi.com/2072-6643/9/2/90/xml |
| article pdf uploaded. | 28 January 2017 10:44 CET | Version of Record | https://www.mdpi.com/2072-6643/9/2/90/pdf |
