| article html file updated | 8 February 2020 17:39 CET | Update | https://www.mdpi.com/2227-9032/5/4/69 |
| article html file updated | 27 September 2019 12:15 CEST | Update | - |
| article html file updated | 2 May 2019 23:01 CEST | Update | - |
| article html file updated | 2 January 2018 12:37 CET | Update | - |
| article html file updated | 10 October 2017 14:16 CEST | Original file | - |
| article xml uploaded. | 10 October 2017 14:15 CEST | Original file | https://www.mdpi.com/2227-9032/5/4/69/xml |
| article pdf uploaded. | 10 October 2017 14:15 CEST | Updated version of record | https://www.mdpi.com/2227-9032/5/4/69/pdf |
| article pdf uploaded. | 1 October 2017 12:15 CEST | Version of Record | https://www.mdpi.com/2227-9032/5/4/69/pdf-vor |
