| article html file updated | 7 February 2020 05:19 CET | Update | https://www.mdpi.com/2227-7080/4/1/8 |
| article html file updated | 5 May 2019 22:42 CEST | Update | - |
| article html file updated | 26 March 2019 22:19 CET | Original file | - |
| article pdf uploaded. | 2 March 2016 09:53 CET | Version of Record | https://www.mdpi.com/2227-7080/4/1/8/pdf |
| article xml uploaded. | 2 March 2016 09:53 CET | Original file | https://www.mdpi.com/2227-7080/4/1/8/xml |
