| article html file updated | 7 February 2020 04:37 CET | Update | https://www.mdpi.com/2076-3263/6/1/9 |
| article html file updated | 6 May 2019 00:13 CEST | Update | - |
| article html file updated | 26 March 2019 20:51 CET | Original file | - |
| article pdf uploaded. | 16 February 2016 11:24 CET | Version of Record | https://www.mdpi.com/2076-3263/6/1/9/pdf |
| article xml uploaded. | 16 February 2016 11:24 CET | Original file | https://www.mdpi.com/2076-3263/6/1/9/xml |
