| article html file updated | 6 February 2020 02:00 CET | Update | https://www.mdpi.com/2073-4395/3/2/433 |
| article html file updated | 20 March 2019 22:19 CET | Update | - |
| article html file updated | 17 June 2015 09:11 CEST | Original file | - |
| article pdf uploaded. | 13 May 2013 15:11 CEST | Updated version of record | https://www.mdpi.com/2073-4395/3/2/433/pdf |
| article pdf uploaded. | 10 May 2013 16:15 CEST | Version of Record | https://www.mdpi.com/2073-4395/3/2/433/pdf-vor |
