| article html file updated | 7 February 2020 04:17 CET | Update | https://www.mdpi.com/1999-4907/7/2/36 |
| article html file updated | 6 May 2019 00:57 CEST | Update | - |
| article html file updated | 26 March 2019 20:08 CET | Original file | - |
| article pdf uploaded. | 4 February 2016 12:12 CET | Version of Record | https://www.mdpi.com/1999-4907/7/2/36/pdf |
| article xml uploaded. | 4 February 2016 12:12 CET | Original file | https://www.mdpi.com/1999-4907/7/2/36/xml |
