| article html file updated | 3 May 2019 14:11 CEST | Update | https://www.mdpi.com/2076-0752/6/3/9 |
| article html file updated | 30 September 2017 11:49 CEST | Update | N/A |
| article html file updated | 10 July 2017 16:48 CEST | Original file | N/A |
| article xml uploaded. | 10 July 2017 16:46 CEST | Update | https://www.mdpi.com/2076-0752/6/3/9/xml |
| article pdf uploaded. | 10 July 2017 16:46 CEST | Updated version of record | https://www.mdpi.com/2076-0752/6/3/9/pdf |
| article pdf uploaded. | 6 July 2017 09:47 CEST | Updated version of record | https://www.mdpi.com/2076-0752/6/3/9/pdf-vor |
| article pdf uploaded. | 4 July 2017 11:11 CEST | Version of Record | https://www.mdpi.com/2076-0752/6/3/9/pdf-vor |
