| article html file updated | 7 February 2020 21:07 CET | Update | https://www.mdpi.com/2079-9292/6/1/7 |
| article html file updated | 4 May 2019 16:04 CEST | Update | - |
| article html file updated | 29 March 2017 10:15 CEST | Update | - |
| article html file updated | 10 January 2017 12:51 CET | Original file | - |
| article xml uploaded. | 10 January 2017 12:50 CET | Update | https://www.mdpi.com/2079-9292/6/1/7/xml |
| article xml uploaded. | 10 January 2017 12:50 CET | Original file | - |
| article pdf uploaded. | 10 January 2017 12:50 CET | Version of Record | https://www.mdpi.com/2079-9292/6/1/7/pdf |
