| article html file updated | 6 February 2020 21:19 CET | Update | https://www.mdpi.com/2227-9067/2/3/342 |
| article html file updated | 6 May 2019 14:29 CEST | Update | - |
| article html file updated | 26 March 2019 07:51 CET | Update | - |
| article html file updated | 21 August 2015 15:22 CEST | Original file | - |
| article pdf uploaded. | 31 July 2015 15:06 CEST | Version of Record | https://www.mdpi.com/2227-9067/2/3/342/pdf |
