| article html file updated | 6 February 2020 12:47 CET | Update | https://www.mdpi.com/2306-7381/1/3/136 |
| article html file updated | 20 September 2019 13:41 CEST | Update | - |
| article html file updated | 7 May 2019 07:13 CEST | Update | - |
| article html file updated | 22 March 2019 02:26 CET | Update | - |
| article html file updated | 20 August 2015 22:52 CEST | Original file | - |
| article pdf uploaded. | 13 October 2014 13:34 CEST | Version of Record | https://www.mdpi.com/2306-7381/1/3/136/pdf |
