| article html file updated | 8 February 2020 22:03 CET | Update | https://www.mdpi.com/2227-7390/5/4/69 |
| article html file updated | 28 September 2019 17:08 CEST | Update | - |
| article html file updated | 2 May 2019 13:04 CEST | Update | - |
| article html file updated | 18 April 2019 10:42 CEST | Update | - |
| article html file updated | 2 January 2018 11:36 CET | Update | - |
| article html file updated | 24 November 2017 10:45 CET | Original file | - |
| article xml uploaded. | 24 November 2017 10:44 CET | Original file | https://www.mdpi.com/2227-7390/5/4/69/xml |
| article pdf uploaded. | 24 November 2017 10:44 CET | Updated version of record | https://www.mdpi.com/2227-7390/5/4/69/pdf |
| article pdf uploaded. | 23 November 2017 12:27 CET | Version of Record | https://www.mdpi.com/2227-7390/5/4/69/pdf-vor |
