| article html file updated | 6 February 2020 14:11 CET | Update | https://www.mdpi.com/1996-1944/7/12/7770 |
| article html file updated | 7 May 2019 04:30 CEST | Update | - |
| article html file updated | 25 March 2019 18:47 CET | Update | - |
| article html file updated | 21 August 2015 03:24 CEST | Update | - |
| article html file updated | 16 December 2014 04:58 CET | Original file | - |
| article xml file uploaded | 16 December 2014 04:58 CET | Original file | https://www.mdpi.com/1996-1944/7/12/7770/xml |
| article pdf uploaded. | 8 December 2014 11:05 CET | Updated version of record | https://www.mdpi.com/1996-1944/7/12/7770/pdf |
| article pdf uploaded. | 5 December 2014 15:54 CET | Updated version of record | https://www.mdpi.com/1996-1944/7/12/7770/pdf-vor |
| article pdf uploaded. | 4 December 2014 12:11 CET | Version of Record | https://www.mdpi.com/1996-1944/7/12/7770/pdf-vor |
