| article html file updated | 7 February 2020 01:33 CET | Update | https://www.mdpi.com/2306-7381/2/4/423 |
| article html file updated | 6 May 2019 06:23 CEST | Update | - |
| article html file updated | 26 March 2019 15:21 CET | Original file | - |
| article pdf uploaded. | 1 December 2015 14:36 CET | Version of Record | https://www.mdpi.com/2306-7381/2/4/423/pdf |
| article xml uploaded. | 1 December 2015 14:36 CET | Original file | https://www.mdpi.com/2306-7381/2/4/423/xml |
