| article html file updated | 7 February 2020 23:21 CET | Update | https://www.mdpi.com/2072-6643/9/2/139 |
| article html file updated | 23 September 2019 07:41 CEST | Update | - |
| article html file updated | 4 May 2019 11:21 CEST | Update | - |
| article html file updated | 2 March 2017 03:51 CET | Update | - |
| article html file updated | 14 February 2017 11:05 CET | Original file | - |
| article xml uploaded. | 14 February 2017 11:03 CET | Original file | https://www.mdpi.com/2072-6643/9/2/139/xml |
| article pdf uploaded. | 14 February 2017 11:03 CET | Version of Record | https://www.mdpi.com/2072-6643/9/2/139/pdf |
