| article html file updated | 6 February 2020 14:33 CET | Update | https://www.mdpi.com/1996-1073/7/12/8427 |
| article html file updated | 7 May 2019 03:46 CEST | Update | - |
| article html file updated | 25 March 2019 19:27 CET | Update | - |
| article html file updated | 21 August 2015 04:24 CEST | Update | - |
| article html file updated | 30 December 2014 09:33 CET | Original file | - |
| article xml file uploaded | 30 December 2014 09:33 CET | Original file | https://www.mdpi.com/1996-1073/7/12/8427/xml |
| article pdf uploaded. | 18 December 2014 16:37 CET | Updated version of record | https://www.mdpi.com/1996-1073/7/12/8427/pdf |
| article pdf uploaded. | 17 December 2014 15:13 CET | Version of Record | https://www.mdpi.com/1996-1073/7/12/8427/pdf-vor |
