| article html file updated | 6 February 2020 02:49 CET | Update | https://www.mdpi.com/1996-1073/6/7/3097 |
| article html file updated | 8 May 2019 03:39 CEST | Update | - |
| article html file updated | 21 March 2019 00:17 CET | Original file | - |
| article pdf uploaded. | 1 July 2013 16:29 CEST | Updated version of record | https://www.mdpi.com/1996-1073/6/7/3097/pdf |
| article pdf uploaded. | 25 June 2013 12:04 CEST | Version of Record | https://www.mdpi.com/1996-1073/6/7/3097/pdf-vor |
