| article html file updated | 7 February 2020 04:14 CET | Update | https://www.mdpi.com/1999-4915/8/2/41 |
| article html file updated | 6 May 2019 01:03 CEST | Update | - |
| article html file updated | 26 March 2019 20:02 CET | Original file | - |
| article pdf uploaded. | 3 February 2016 11:30 CET | Version of Record | https://www.mdpi.com/1999-4915/8/2/41/pdf |
| article xml uploaded. | 3 February 2016 11:30 CET | Original file | https://www.mdpi.com/1999-4915/8/2/41/xml |
