| article html file updated | 6 February 2020 23:33 CET | Update | https://www.mdpi.com/1999-4893/8/4/850 |
| article html file updated | 6 May 2019 09:48 CEST | Update | - |
| article html file updated | 26 March 2019 12:09 CET | Update | - |
| article html file updated | 29 October 2015 14:00 CET | Original file | - |
| article xml file uploaded | 29 October 2015 14:00 CET | Original file | https://www.mdpi.com/1999-4893/8/4/850/xml |
| article pdf uploaded. | 12 October 2015 08:05 CEST | Updated version of record | https://www.mdpi.com/1999-4893/8/4/850/pdf |
| article pdf uploaded. | 9 October 2015 12:08 CEST | Version of Record | https://www.mdpi.com/1999-4893/8/4/850/pdf-vor |
