| article html file updated | 8 February 2020 03:44 CET | Update | https://www.mdpi.com/2073-4344/7/4/117 |
| article html file updated | 24 September 2019 08:36 CEST | Update | - |
| article html file updated | 4 May 2019 01:57 CEST | Update | - |
| article html file updated | 28 April 2017 05:35 CEST | Update | - |
| article html file updated | 17 April 2017 11:39 CEST | Original file | - |
| article xml uploaded. | 17 April 2017 11:38 CEST | Original file | https://www.mdpi.com/2073-4344/7/4/117/xml |
| article pdf uploaded. | 17 April 2017 11:38 CEST | Version of Record | https://www.mdpi.com/2073-4344/7/4/117/pdf |
