| article html file updated | 8 February 2020 14:34 CET | Update | https://www.mdpi.com/2223-7747/6/3/34 |
| article html file updated | 26 September 2019 18:38 CEST | Update | - |
| article html file updated | 3 May 2019 04:58 CEST | Update | - |
| article html file updated | 30 September 2017 14:25 CEST | Update | - |
| article html file updated | 26 August 2017 10:39 CEST | Original file | - |
| article xml uploaded. | 26 August 2017 10:38 CEST | Original file | https://www.mdpi.com/2223-7747/6/3/34/xml |
| article pdf uploaded. | 26 August 2017 10:38 CEST | Version of Record | https://www.mdpi.com/2223-7747/6/3/34/pdf |
