| article html file updated | 8 February 2020 03:33 CET | Update | https://www.mdpi.com/2076-0817/6/2/15 |
| article html file updated | 24 September 2019 07:31 CEST | Update | - |
| article html file updated | 4 May 2019 02:17 CEST | Update | - |
| article html file updated | 29 June 2017 12:39 CEST | Update | - |
| article html file updated | 17 April 2017 12:16 CEST | Original file | - |
| article xml uploaded. | 17 April 2017 12:15 CEST | Original file | https://www.mdpi.com/2076-0817/6/2/15/xml |
| article pdf uploaded. | 17 April 2017 12:15 CEST | Version of Record | https://www.mdpi.com/2076-0817/6/2/15/pdf |
