| article html file updated | 8 February 2020 08:28 CET | Update | https://www.mdpi.com/1999-4907/8/6/213 |
| article html file updated | 25 September 2019 09:25 CEST | Update | - |
| article html file updated | 3 May 2019 17:07 CEST | Update | - |
| article html file updated | 27 June 2017 11:20 CEST | Update | - |
| article html file updated | 17 June 2017 08:00 CEST | Original file | - |
| article xml uploaded. | 17 June 2017 07:59 CEST | Original file | https://www.mdpi.com/1999-4907/8/6/213/xml |
| article pdf uploaded. | 17 June 2017 07:59 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/6/213/pdf |
