| article html file updated | 7 February 2020 04:05 CET | Update | https://www.mdpi.com/2073-4344/6/2/23 |
| article html file updated | 6 May 2019 01:19 CEST | Update | - |
| article html file updated | 26 March 2019 19:45 CET | Original file | - |
| article pdf uploaded. | 29 January 2016 13:27 CET | Version of Record | https://www.mdpi.com/2073-4344/6/2/23/pdf |
| article xml uploaded. | 29 January 2016 13:27 CET | Original file | https://www.mdpi.com/2073-4344/6/2/23/xml |
