| article html file updated | 7 February 2020 22:12 CET | Update | https://www.mdpi.com/2076-2615/7/2/6 |
| article html file updated | 23 September 2019 01:25 CEST | Update | N/A |
| article html file updated | 4 May 2019 13:38 CEST | Update | N/A |
| article html file updated | 2 March 2017 08:48 CET | Update | N/A |
| article html file updated | 25 January 2017 08:32 CET | Original file | N/A |
| article xml uploaded. | 25 January 2017 08:30 CET | Original file | https://www.mdpi.com/2076-2615/7/2/6/xml |
| article pdf uploaded. | 25 January 2017 08:30 CET | Version of Record | https://www.mdpi.com/2076-2615/7/2/6/pdf |
