| article html file updated | 7 February 2020 21:39 CET | Update | https://www.mdpi.com/1660-3397/15/1/19 |
| article html file updated | 22 September 2019 22:27 CEST | Update | - |
| article html file updated | 4 May 2019 14:47 CEST | Update | - |
| article html file updated | 7 February 2017 13:38 CET | Update | - |
| article html file updated | 18 January 2017 08:48 CET | Original file | - |
| article xml uploaded. | 18 January 2017 08:47 CET | Original file | https://www.mdpi.com/1660-3397/15/1/19/xml |
| article pdf uploaded. | 18 January 2017 08:47 CET | Version of Record | https://www.mdpi.com/1660-3397/15/1/19/pdf |
