| article html file updated | 8 February 2020 07:08 CET | Update | https://www.mdpi.com/1999-4907/8/6/189 |
| article html file updated | 25 September 2019 02:34 CEST | Update | - |
| article html file updated | 3 May 2019 19:37 CEST | Update | - |
| article html file updated | 27 June 2017 11:17 CEST | Update | - |
| article html file updated | 31 May 2017 14:45 CEST | Original file | - |
| article xml uploaded. | 31 May 2017 14:44 CEST | Original file | https://www.mdpi.com/1999-4907/8/6/189/xml |
| article pdf uploaded. | 31 May 2017 14:44 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/6/189/pdf |
