| article html file updated | 7 February 2020 22:02 CET | Update | https://www.mdpi.com/1660-3397/15/1/22 |
| article html file updated | 23 September 2019 00:29 CEST | Update | - |
| article html file updated | 4 May 2019 13:58 CEST | Update | - |
| article html file updated | 7 February 2017 13:40 CET | Update | - |
| article html file updated | 23 January 2017 09:53 CET | Original file | - |
| article xml uploaded. | 23 January 2017 09:51 CET | Original file | https://www.mdpi.com/1660-3397/15/1/22/xml |
| article pdf uploaded. | 23 January 2017 09:51 CET | Version of Record | https://www.mdpi.com/1660-3397/15/1/22/pdf |
