| article html file updated | 7 February 2020 23:49 CET | Update | https://www.mdpi.com/2073-4441/9/2/135 |
| article html file updated | 23 September 2019 10:21 CEST | Update | - |
| article html file updated | 4 May 2019 10:24 CEST | Update | - |
| article html file updated | 1 March 2017 08:10 CET | Update | - |
| article html file updated | 20 February 2017 14:14 CET | Original file | - |
| article xml uploaded. | 20 February 2017 14:13 CET | Original file | https://www.mdpi.com/2073-4441/9/2/135/xml |
| article pdf uploaded. | 20 February 2017 14:13 CET | Version of Record | https://www.mdpi.com/2073-4441/9/2/135/pdf |
