| article html file updated | 7 February 2020 01:56 CET | Update | https://www.mdpi.com/2076-0825/4/4/314 |
| article html file updated | 6 May 2019 05:35 CEST | Update | - |
| article html file updated | 26 March 2019 16:00 CET | Original file | - |
| article pdf uploaded. | 9 December 2015 09:21 CET | Updated version of record | https://www.mdpi.com/2076-0825/4/4/314/pdf |
| article pdf uploaded. | 8 December 2015 13:36 CET | Version of Record | https://www.mdpi.com/2076-0825/4/4/314/pdf-vor |
| article xml uploaded. | 8 December 2015 13:36 CET | Original file | https://www.mdpi.com/2076-0825/4/4/314/xml |
