| article html file updated | 7 February 2020 14:48 CET | Update | https://www.mdpi.com/2075-4701/6/9/221 |
| article html file updated | 5 May 2019 04:26 CEST | Update | - |
| article html file updated | 27 September 2016 10:11 CEST | Update | - |
| article html file updated | 10 September 2016 10:13 CEST | Original file | - |
| article xml uploaded. | 10 September 2016 10:11 CEST | Update | https://www.mdpi.com/2075-4701/6/9/221/xml |
| article xml uploaded. | 10 September 2016 10:11 CEST | Update | - |
| article xml uploaded. | 10 September 2016 10:11 CEST | Update | - |
| article xml uploaded. | 10 September 2016 10:11 CEST | Original file | - |
| article pdf uploaded. | 10 September 2016 10:11 CEST | Version of Record | https://www.mdpi.com/2075-4701/6/9/221/pdf |
