| article html file updated | 8 February 2020 03:32 CET | Update | https://www.mdpi.com/1424-8220/17/4/851 |
| article html file updated | 4 May 2019 02:20 CEST | Update | - |
| article html file updated | 29 April 2017 14:10 CEST | Update | - |
| article html file updated | 14 April 2017 12:33 CEST | Original file | - |
| article xml uploaded. | 14 April 2017 12:32 CEST | Original file | https://www.mdpi.com/1424-8220/17/4/851/xml |
| article pdf uploaded. | 14 April 2017 12:32 CEST | Updated version of record | https://www.mdpi.com/1424-8220/17/4/851/pdf |
| article pdf uploaded. | 13 April 2017 15:11 CEST | Version of Record | https://www.mdpi.com/1424-8220/17/4/851/pdf-vor |
