| article html file updated | 7 February 2020 17:44 CET | Update | https://www.mdpi.com/2218-273X/6/4/43 |
| article html file updated | 22 September 2019 05:08 CEST | Update | - |
| article html file updated | 4 May 2019 23:02 CEST | Update | - |
| article html file updated | 29 December 2016 04:28 CET | Original file | - |
| article xml uploaded. | 9 November 2016 10:46 CET | Update | https://www.mdpi.com/2218-273X/6/4/43/xml |
| article xml uploaded. | 9 November 2016 10:46 CET | Original file | - |
| article pdf uploaded. | 9 November 2016 10:46 CET | Version of Record | https://www.mdpi.com/2218-273X/6/4/43/pdf |
