| article html file updated | 7 February 2020 00:34 CET | Update | https://www.mdpi.com/1999-4907/6/11/3970 |
| article html file updated | 6 May 2019 07:44 CEST | Update | N/A |
| article html file updated | 26 March 2019 14:04 CET | Original file | N/A |
| article pdf uploaded. | 4 November 2015 14:25 CET | Version of Record | https://www.mdpi.com/1999-4907/6/11/3970/pdf |
