| article html file updated | 8 February 2020 19:15 CET | Update | https://www.mdpi.com/2227-7390/5/4/54 |
| article html file updated | 27 September 2019 23:06 CEST | Update | - |
| article html file updated | 2 May 2019 19:27 CEST | Update | - |
| article html file updated | 2 January 2018 11:33 CET | Update | - |
| article html file updated | 24 October 2017 05:50 CEST | Original file | - |
| article xml uploaded. | 24 October 2017 05:49 CEST | Original file | https://www.mdpi.com/2227-7390/5/4/54/xml |
| article pdf uploaded. | 24 October 2017 05:49 CEST | Updated version of record | https://www.mdpi.com/2227-7390/5/4/54/pdf |
| article pdf uploaded. | 23 October 2017 15:44 CEST | Version of Record | https://www.mdpi.com/2227-7390/5/4/54/pdf-vor |
