| article html file updated | 8 February 2020 15:09 CET | Update | https://www.mdpi.com/2073-4441/9/9/664 |
| article html file updated | 26 September 2019 21:58 CEST | Update | N/A |
| article html file updated | 3 May 2019 03:52 CEST | Update | N/A |
| article html file updated | 30 September 2017 11:05 CEST | Update | N/A |
| article html file updated | 2 September 2017 09:21 CEST | Original file | N/A |
| article xml uploaded. | 2 September 2017 09:20 CEST | Original file | https://www.mdpi.com/2073-4441/9/9/664/xml |
| article pdf uploaded. | 2 September 2017 09:20 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/9/664/pdf |
