| article html file updated | 9 February 2020 04:15 CET | Update | https://www.mdpi.com/2218-273X/8/1/6 |
| article html file updated | 1 May 2019 23:46 CEST | Update | - |
| article html file updated | 17 April 2019 22:19 CEST | Update | - |
| article html file updated | 28 March 2019 18:08 CET | Update | - |
| article html file updated | 27 March 2018 14:24 CEST | Update | - |
| article html file updated | 24 January 2018 16:23 CET | Original file | - |
| article xml uploaded. | 24 January 2018 16:22 CET | Original file | https://www.mdpi.com/2218-273X/8/1/6/xml |
| article pdf uploaded. | 24 January 2018 16:22 CET | Version of Record | https://www.mdpi.com/2218-273X/8/1/6/pdf |
