| article html file updated | 8 February 2020 03:20 CET | Update | https://www.mdpi.com/1660-3397/15/4/117 |
| article html file updated | 24 September 2019 06:22 CEST | Update | - |
| article html file updated | 4 May 2019 02:41 CEST | Update | - |
| article html file updated | 28 April 2017 08:24 CEST | Update | - |
| article html file updated | 12 April 2017 14:15 CEST | Original file | - |
| article xml uploaded. | 12 April 2017 14:13 CEST | Update | https://www.mdpi.com/1660-3397/15/4/117/xml |
| article pdf uploaded. | 12 April 2017 14:13 CEST | Updated version of record | https://www.mdpi.com/1660-3397/15/4/117/pdf |
| article pdf uploaded. | 11 April 2017 11:49 CEST | Version of Record | https://www.mdpi.com/1660-3397/15/4/117/pdf-vor |
