| article html file updated | 8 February 2020 07:47 CET | Update | https://www.mdpi.com/1660-3397/15/6/168 |
| article html file updated | 25 September 2019 05:54 CEST | Update | - |
| article html file updated | 3 May 2019 18:23 CEST | Update | - |
| article html file updated | 27 June 2017 11:29 CEST | Update | - |
| article html file updated | 12 June 2017 08:53 CEST | Original file | - |
| article xml uploaded. | 12 June 2017 08:51 CEST | Original file | https://www.mdpi.com/1660-3397/15/6/168/xml |
| article pdf uploaded. | 12 June 2017 08:51 CEST | Updated version of record | https://www.mdpi.com/1660-3397/15/6/168/pdf |
| article pdf uploaded. | 8 June 2017 12:22 CEST | Version of Record | https://www.mdpi.com/1660-3397/15/6/168/pdf-vor |
