| article html file updated | 9 February 2020 00:33 CET | Update | https://www.mdpi.com/2223-7747/6/4/64 |
| article html file updated | 29 September 2019 07:59 CEST | Update | - |
| article html file updated | 2 May 2019 07:32 CEST | Update | - |
| article html file updated | 18 April 2019 05:23 CEST | Update | - |
| article html file updated | 2 January 2018 20:20 CET | Update | - |
| article html file updated | 19 December 2017 13:10 CET | Original file | - |
| article xml uploaded. | 19 December 2017 13:09 CET | Update | https://www.mdpi.com/2223-7747/6/4/64/xml |
| article xml uploaded. | 19 December 2017 13:09 CET | Original file | - |
| article pdf uploaded. | 19 December 2017 13:09 CET | Version of Record | https://www.mdpi.com/2223-7747/6/4/64/pdf |
