| article html file updated | 7 February 2020 03:40 CET | Update | https://www.mdpi.com/2073-4344/6/1/17 |
| article html file updated | 6 May 2019 02:08 CEST | Update | - |
| article html file updated | 26 March 2019 18:55 CET | Original file | - |
| article pdf uploaded. | 20 January 2016 11:35 CET | Version of Record | https://www.mdpi.com/2073-4344/6/1/17/pdf |
| article xml uploaded. | 20 January 2016 11:35 CET | Original file | https://www.mdpi.com/2073-4344/6/1/17/xml |
