| article html file updated | 6 February 2020 07:16 CET | Update | https://www.mdpi.com/2073-4395/4/1/108 |
| article html file updated | 21 March 2019 12:22 CET | Update | - |
| article html file updated | 19 August 2015 20:28 CEST | Original file | - |
| article pdf uploaded. | 18 February 2014 15:05 CET | Updated version of record | https://www.mdpi.com/2073-4395/4/1/108/pdf |
| article pdf uploaded. | 17 February 2014 08:59 CET | Version of Record | https://www.mdpi.com/2073-4395/4/1/108/pdf-vor |
