| article html file updated | 7 February 2020 22:10 CET | Update | https://www.mdpi.com/2079-9276/6/1/7 |
| article html file updated | 23 September 2019 01:12 CEST | Update | - |
| article html file updated | 4 May 2019 13:43 CEST | Update | - |
| article html file updated | 30 March 2017 08:57 CEST | Update | - |
| article html file updated | 24 January 2017 11:43 CET | Original file | - |
| article xml uploaded. | 24 January 2017 11:42 CET | Update | https://www.mdpi.com/2079-9276/6/1/7/xml |
| article xml uploaded. | 24 January 2017 11:42 CET | Original file | - |
| article pdf uploaded. | 24 January 2017 11:42 CET | Version of Record | https://www.mdpi.com/2079-9276/6/1/7/pdf |
