| article html file updated | 7 February 2020 22:05 CET | Update | https://www.mdpi.com/2306-5338/4/1/6 |
| article html file updated | 23 September 2019 00:46 CEST | Update | - |
| article html file updated | 4 May 2019 13:52 CEST | Update | - |
| article html file updated | 24 January 2017 06:12 CET | Original file | - |
| article xml uploaded. | 24 January 2017 06:10 CET | Update | https://www.mdpi.com/2306-5338/4/1/6/xml |
| article xml uploaded. | 24 January 2017 06:10 CET | Original file | - |
| article pdf uploaded. | 24 January 2017 06:10 CET | Version of Record | https://www.mdpi.com/2306-5338/4/1/6/pdf |
