| article html file updated | 7 February 2020 16:37 CET | Update | https://www.mdpi.com/2075-163X/6/4/109 |
| article html file updated | 22 September 2019 03:24 CEST | Update | N/A |
| article html file updated | 5 May 2019 01:09 CEST | Update | N/A |
| article html file updated | 30 December 2016 06:02 CET | Update | N/A |
| article html file updated | 19 October 2016 11:58 CEST | Original file | N/A |
| article xml uploaded. | 19 October 2016 11:57 CEST | Original file | https://www.mdpi.com/2075-163X/6/4/109/xml |
| article pdf uploaded. | 19 October 2016 11:57 CEST | Version of Record | https://www.mdpi.com/2075-163X/6/4/109/pdf |
