| article html file updated | 8 February 2020 03:58 CET | Update | https://www.mdpi.com/2073-4352/7/4/117 |
| article html file updated | 24 September 2019 10:00 CEST | Update | - |
| article html file updated | 4 May 2019 01:30 CEST | Update | - |
| article html file updated | 28 April 2017 05:51 CEST | Update | - |
| article html file updated | 20 April 2017 09:11 CEST | Original file | - |
| article xml uploaded. | 20 April 2017 09:09 CEST | Update | https://www.mdpi.com/2073-4352/7/4/117/xml |
| article pdf uploaded. | 20 April 2017 08:27 CEST | Version of Record | https://www.mdpi.com/2073-4352/7/4/117/pdf |
