| article html file updated | 8 February 2020 17:38 CET | Update | https://www.mdpi.com/2227-9717/5/4/55 |
| article html file updated | 27 September 2019 12:05 CEST | Update | - |
| article html file updated | 2 May 2019 23:04 CEST | Update | - |
| article html file updated | 2 January 2018 11:38 CET | Update | - |
| article html file updated | 1 October 2017 05:08 CEST | Original file | - |
| article xml uploaded. | 1 October 2017 05:07 CEST | Original file | https://www.mdpi.com/2227-9717/5/4/55/xml |
| article pdf uploaded. | 1 October 2017 05:07 CEST | Version of Record | https://www.mdpi.com/2227-9717/5/4/55/pdf |
