| article html file updated | 7 February 2020 23:21 CET | Update | https://www.mdpi.com/1660-3397/15/2/38 |
| article html file updated | 23 September 2019 07:44 CEST | Update | - |
| article html file updated | 4 May 2019 11:20 CEST | Update | - |
| article html file updated | 2 March 2017 09:38 CET | Update | - |
| article html file updated | 14 February 2017 11:09 CET | Original file | - |
| article xml uploaded. | 14 February 2017 11:08 CET | Original file | https://www.mdpi.com/1660-3397/15/2/38/xml |
| article pdf uploaded. | 14 February 2017 11:08 CET | Version of Record | https://www.mdpi.com/1660-3397/15/2/38/pdf |
