| article html file updated | 8 February 2020 02:58 CET | Update | https://www.mdpi.com/2076-3905/6/2/7 |
| article html file updated | 24 September 2019 04:19 CEST | Update | - |
| article html file updated | 4 May 2019 03:27 CEST | Update | - |
| article html file updated | 28 June 2017 14:07 CEST | Update | - |
| article html file updated | 7 April 2017 12:41 CEST | Original file | - |
| article xml uploaded. | 7 April 2017 12:40 CEST | Original file | https://www.mdpi.com/2076-3905/6/2/7/xml |
| article pdf uploaded. | 7 April 2017 12:40 CEST | Updated version of record | https://www.mdpi.com/2076-3905/6/2/7/pdf |
| article pdf uploaded. | 5 April 2017 13:22 CEST | Version of Record | https://www.mdpi.com/2076-3905/6/2/7/pdf-vor |
