| article html file updated | 8 February 2020 03:00 CET | Update | https://www.mdpi.com/2076-0752/6/2/4 |
| article html file updated | 4 May 2019 03:22 CEST | Update | - |
| article html file updated | 30 June 2017 09:05 CEST | Update | - |
| article html file updated | 13 April 2017 05:07 CEST | Update | - |
| article html file updated | 12 April 2017 07:48 CEST | Update | - |
| article html file updated | 12 April 2017 07:27 CEST | Update | - |
| article html file updated | 12 April 2017 05:26 CEST | Update | - |
| article html file updated | 10 April 2017 08:59 CEST | Original file | - |
| article xml uploaded. | 10 April 2017 08:58 CEST | Original file | https://www.mdpi.com/2076-0752/6/2/4/xml |
| article pdf uploaded. | 10 April 2017 08:58 CEST | Updated version of record | https://www.mdpi.com/2076-0752/6/2/4/pdf |
| article pdf uploaded. | 6 April 2017 14:47 CEST | Version of Record | https://www.mdpi.com/2076-0752/6/2/4/pdf-vor |
