| article html file updated | 8 February 2020 03:44 CET | Update | https://www.mdpi.com/2077-1444/8/4/69 |
| article html file updated | 24 September 2019 08:37 CEST | Update | - |
| article html file updated | 4 May 2019 01:56 CEST | Update | - |
| article html file updated | 28 April 2017 07:14 CEST | Update | - |
| article html file updated | 17 April 2017 14:40 CEST | Original file | - |
| article xml uploaded. | 17 April 2017 14:39 CEST | Update | https://www.mdpi.com/2077-1444/8/4/69/xml |
| article pdf uploaded. | 17 April 2017 14:39 CEST | Version of Record | https://www.mdpi.com/2077-1444/8/4/69/pdf |
