| article html file updated | 7 February 2020 21:10 CET | Update | https://www.mdpi.com/1660-3397/15/1/4 |
| article html file updated | 22 September 2019 19:53 CEST | Update | - |
| article html file updated | 4 May 2019 15:58 CEST | Update | - |
| article html file updated | 7 February 2017 13:33 CET | Update | - |
| article html file updated | 11 January 2017 04:37 CET | Original file | - |
| article xml uploaded. | 11 January 2017 04:36 CET | Update | https://www.mdpi.com/1660-3397/15/1/4/xml |
| article xml uploaded. | 11 January 2017 04:36 CET | Original file | - |
| article pdf uploaded. | 11 January 2017 04:36 CET | Version of Record | https://www.mdpi.com/1660-3397/15/1/4/pdf |
