| article html file updated | 7 February 2020 02:43 CET | Update | https://www.mdpi.com/1424-8220/16/1/7 |
| article html file updated | 6 May 2019 03:55 CEST | Update | - |
| article html file updated | 26 March 2019 17:16 CET | Original file | - |
| article pdf uploaded. | 25 December 2015 09:20 CET | Version of Record | https://www.mdpi.com/1424-8220/16/1/7/pdf |
| article xml uploaded. | 25 December 2015 09:20 CET | Original file | https://www.mdpi.com/1424-8220/16/1/7/xml |
