| article html file updated | 7 February 2020 22:55 CET | Update | https://www.mdpi.com/2077-0375/7/1/6 |
| article html file updated | 4 May 2019 12:12 CEST | Update | - |
| article html file updated | 30 March 2017 10:58 CEST | Update | - |
| article html file updated | 20 February 2017 13:24 CET | Original file | - |
| article xml uploaded. | 20 February 2017 13:23 CET | Update | https://www.mdpi.com/2077-0375/7/1/6/xml |
| article xml uploaded. | 20 February 2017 13:23 CET | Original file | - |
| article pdf uploaded. | 20 February 2017 13:23 CET | Updated version of record | https://www.mdpi.com/2077-0375/7/1/6/pdf |
| article pdf uploaded. | 9 February 2017 14:25 CET | Updated version of record | https://www.mdpi.com/2077-0375/7/1/6/pdf-vor |
| article pdf uploaded. | 8 February 2017 15:52 CET | Version of Record | https://www.mdpi.com/2077-0375/7/1/6/pdf-vor |
