| article html file updated | 7 February 2020 01:13 CET | Update | https://www.mdpi.com/2076-0817/4/4/816 |
| article html file updated | 6 May 2019 06:50 CEST | Update | - |
| article html file updated | 26 March 2019 14:57 CET | Original file | - |
| article pdf uploaded. | 25 November 2015 03:52 CET | Updated version of record | https://www.mdpi.com/2076-0817/4/4/816/pdf |
| article pdf uploaded. | 20 November 2015 11:47 CET | Version of Record | https://www.mdpi.com/2076-0817/4/4/816/pdf-vor |
