| article html file updated | 7 February 2020 20:55 CET | Update | https://www.mdpi.com/2075-163X/7/1/6 |
| article html file updated | 22 September 2019 18:34 CEST | Update | N/A |
| article html file updated | 4 May 2019 16:31 CEST | Update | N/A |
| article html file updated | 7 February 2017 10:28 CET | Update | N/A |
| article html file updated | 6 January 2017 14:07 CET | Original file | N/A |
| article xml uploaded. | 6 January 2017 14:05 CET | Update | https://www.mdpi.com/2075-163X/7/1/6/xml |
| article pdf uploaded. | 6 January 2017 14:05 CET | Version of Record | https://www.mdpi.com/2075-163X/7/1/6/pdf |
