| article html file updated | 8 February 2020 07:48 CET | Update | https://www.mdpi.com/1999-4907/8/6/201 |
| article html file updated | 25 September 2019 05:56 CEST | Update | - |
| article html file updated | 3 May 2019 18:22 CEST | Update | - |
| article html file updated | 27 June 2017 11:18 CEST | Update | - |
| article html file updated | 12 June 2017 11:56 CEST | Original file | - |
| article xml uploaded. | 12 June 2017 11:54 CEST | Original file | https://www.mdpi.com/1999-4907/8/6/201/xml |
| article pdf uploaded. | 12 June 2017 11:54 CEST | Updated version of record | https://www.mdpi.com/1999-4907/8/6/201/pdf |
| article pdf uploaded. | 8 June 2017 13:36 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/6/201/pdf-vor |
