| article html file updated | 7 February 2020 04:10 CET | Update | https://www.mdpi.com/2072-6694/8/2/20 |
| article html file updated | 6 May 2019 01:12 CEST | Update | - |
| article html file updated | 26 March 2019 19:53 CET | Original file | - |
| article pdf uploaded. | 2 February 2016 09:22 CET | Version of Record | https://www.mdpi.com/2072-6694/8/2/20/pdf |
| article xml uploaded. | 2 February 2016 09:22 CET | Original file | https://www.mdpi.com/2072-6694/8/2/20/xml |
