| article html file updated | 7 February 2020 04:42 CET | Update | https://www.mdpi.com/1999-4907/7/2/45 |
| article html file updated | 6 May 2019 00:00 CEST | Update | - |
| article html file updated | 26 March 2019 21:02 CET | Original file | - |
| article pdf uploaded. | 18 February 2016 11:40 CET | Version of Record | https://www.mdpi.com/1999-4907/7/2/45/pdf |
| article xml uploaded. | 18 February 2016 11:40 CET | Original file | https://www.mdpi.com/1999-4907/7/2/45/xml |
