| article html file updated | 7 February 2020 05:16 CET | Update | https://www.mdpi.com/2076-0787/5/1/17 |
| article html file updated | 5 May 2019 22:47 CEST | Update | - |
| article html file updated | 26 March 2019 22:14 CET | Original file | - |
| article pdf uploaded. | 1 March 2016 12:57 CET | Version of Record | https://www.mdpi.com/2076-0787/5/1/17/pdf |
| article xml uploaded. | 1 March 2016 12:57 CET | Original file | https://www.mdpi.com/2076-0787/5/1/17/xml |
