| article html file updated | 7 February 2020 04:31 CET | Update | https://www.mdpi.com/2076-0817/5/1/20 |
| article html file updated | 6 May 2019 00:26 CEST | Update | - |
| article html file updated | 26 March 2019 20:39 CET | Update | - |
| article html file updated | 29 March 2016 07:18 CEST | Original file | - |
| article pdf uploaded. | 14 February 2016 10:25 CET | Version of Record | https://www.mdpi.com/2076-0817/5/1/20/pdf |
| article xml uploaded. | 14 February 2016 10:25 CET | Original file | https://www.mdpi.com/2076-0817/5/1/20/xml |
