| article html file updated | 8 February 2020 03:53 CET | Update | https://www.mdpi.com/2073-4344/7/4/121 |
| article html file updated | 24 September 2019 09:32 CEST | Update | - |
| article html file updated | 4 May 2019 01:39 CEST | Update | - |
| article html file updated | 28 April 2017 05:36 CEST | Update | - |
| article html file updated | 19 April 2017 11:55 CEST | Original file | - |
| article xml uploaded. | 19 April 2017 11:53 CEST | Update | https://www.mdpi.com/2073-4344/7/4/121/xml |
| article pdf uploaded. | 19 April 2017 11:53 CEST | Version of Record | https://www.mdpi.com/2073-4344/7/4/121/pdf |
