| article html file updated | 8 February 2020 19:54 CET | Update | https://www.mdpi.com/2218-6581/6/4/29 |
| article html file updated | 28 September 2019 03:05 CEST | Update | - |
| article html file updated | 2 May 2019 17:57 CEST | Update | - |
| article html file updated | 2 January 2018 10:43 CET | Update | - |
| article html file updated | 31 October 2017 03:35 CET | Original file | - |
| article xml uploaded. | 31 October 2017 03:33 CET | Update | https://www.mdpi.com/2218-6581/6/4/29/xml |
| article xml uploaded. | 31 October 2017 03:33 CET | Original file | - |
| article pdf uploaded. | 31 October 2017 03:33 CET | Version of Record | https://www.mdpi.com/2218-6581/6/4/29/pdf |
