| article html file updated | 7 February 2020 14:07 CET | Update | https://www.mdpi.com/2073-4344/6/9/131 |
| article html file updated | 5 May 2019 05:40 CEST | Update | - |
| article html file updated | 27 March 2019 15:19 CET | Update | - |
| article html file updated | 28 September 2016 22:57 CEST | Update | - |
| article html file updated | 30 August 2016 12:54 CEST | Original file | - |
| article xml uploaded. | 30 August 2016 12:52 CEST | Original file | https://www.mdpi.com/2073-4344/6/9/131/xml |
| article pdf uploaded. | 30 August 2016 12:52 CEST | Version of Record | https://www.mdpi.com/2073-4344/6/9/131/pdf |
