| article html file updated | 7 February 2020 22:44 CET | Update | https://www.mdpi.com/2076-3263/7/1/6 |
| article html file updated | 23 September 2019 04:20 CEST | Update | - |
| article html file updated | 4 May 2019 12:34 CEST | Update | - |
| article html file updated | 25 July 2017 10:21 CEST | Update | - |
| article html file updated | 6 February 2017 14:42 CET | Original file | - |
| article xml uploaded. | 6 February 2017 14:41 CET | Original file | https://www.mdpi.com/2076-3263/7/1/6/xml |
| article pdf uploaded. | 6 February 2017 14:41 CET | Version of Record | https://www.mdpi.com/2076-3263/7/1/6/pdf |
