| article html file updated | 8 February 2020 20:00 CET | Update | https://www.mdpi.com/2227-7390/5/4/57 |
| article html file updated | 2 May 2019 17:44 CEST | Update | - |
| article html file updated | 2 January 2018 11:34 CET | Update | - |
| article html file updated | 2 November 2017 04:06 CET | Update | - |
| article xml uploaded. | 2 November 2017 04:05 CET | Update | https://www.mdpi.com/2227-7390/5/4/57/xml |
| article pdf uploaded. | 2 November 2017 04:05 CET | Updated version of record | https://www.mdpi.com/2227-7390/5/4/57/pdf |
| article html file updated | 1 November 2017 05:46 CET | Original file | - |
| article xml uploaded. | 1 November 2017 03:22 CET | Original file | - |
| article pdf uploaded. | 1 November 2017 03:22 CET | Version of Record | https://www.mdpi.com/2227-7390/5/4/57/pdf-vor |
