| article html file updated | 7 February 2020 19:36 CET | Update | https://www.mdpi.com/2075-163X/6/4/131 |
| article html file updated | 22 September 2019 11:29 CEST | Update | - |
| article html file updated | 4 May 2019 19:14 CEST | Update | - |
| article html file updated | 30 December 2016 06:14 CET | Update | - |
| article html file updated | 14 December 2016 11:49 CET | Original file | - |
| article xml uploaded. | 14 December 2016 11:47 CET | Original file | https://www.mdpi.com/2075-163X/6/4/131/xml |
| article pdf uploaded. | 14 December 2016 11:47 CET | Version of Record | https://www.mdpi.com/2075-163X/6/4/131/pdf |
