| article html file updated | 7 February 2020 04:19 CET | Update | https://www.mdpi.com/2073-4344/6/2/25 |
| article html file updated | 6 May 2019 00:53 CEST | Update | - |
| article html file updated | 26 March 2019 20:13 CET | Original file | - |
| article pdf uploaded. | 5 February 2016 08:58 CET | Version of Record | https://www.mdpi.com/2073-4344/6/2/25/pdf |
| article xml uploaded. | 5 February 2016 08:58 CET | Original file | https://www.mdpi.com/2073-4344/6/2/25/xml |
