| article html file updated | 8 February 2020 19:09 CET | Update | https://www.mdpi.com/2223-7747/6/4/48 |
| article html file updated | 27 September 2019 22:32 CEST | Update | - |
| article html file updated | 2 May 2019 19:40 CEST | Update | - |
| article html file updated | 2 January 2018 20:21 CET | Update | - |
| article html file updated | 23 October 2017 04:33 CEST | Original file | - |
| article xml uploaded. | 23 October 2017 04:32 CEST | Update | https://www.mdpi.com/2223-7747/6/4/48/xml |
| article xml uploaded. | 23 October 2017 04:32 CEST | Original file | - |
| article pdf uploaded. | 23 October 2017 04:32 CEST | Version of Record | https://www.mdpi.com/2223-7747/6/4/48/pdf |
