| article html file updated | 8 February 2020 17:37 CET | Update | https://www.mdpi.com/2076-0825/6/4/29 |
| article html file updated | 27 September 2019 11:59 CEST | Update | - |
| article html file updated | 2 May 2019 23:06 CEST | Update | - |
| article html file updated | 2 January 2018 16:30 CET | Update | - |
| article html file updated | 30 September 2017 16:04 CEST | Original file | - |
| article xml uploaded. | 30 September 2017 13:38 CEST | Original file | https://www.mdpi.com/2076-0825/6/4/29/xml |
| article pdf uploaded. | 30 September 2017 13:38 CEST | Version of Record | https://www.mdpi.com/2076-0825/6/4/29/pdf |
