| article html file updated | 7 February 2020 01:32 CET | Update | https://www.mdpi.com/2227-7080/3/4/238 |
| article html file updated | 6 May 2019 06:24 CEST | Update | - |
| article html file updated | 26 March 2019 15:20 CET | Original file | - |
| article pdf uploaded. | 30 November 2015 14:11 CET | Version of Record | https://www.mdpi.com/2227-7080/3/4/238/pdf |
| article xml uploaded. | 30 November 2015 14:11 CET | Original file | https://www.mdpi.com/2227-7080/3/4/238/xml |
