| article html file updated | 8 February 2020 03:21 CET | Update | https://www.mdpi.com/2073-4441/9/4/269 |
| article html file updated | 4 May 2019 02:40 CEST | Update | - |
| article html file updated | 28 April 2017 11:26 CEST | Update | - |
| article html file updated | 14 April 2017 08:43 CEST | Original file | - |
| article xml uploaded. | 14 April 2017 08:42 CEST | Update | https://www.mdpi.com/2073-4441/9/4/269/xml |
| article pdf uploaded. | 14 April 2017 08:42 CEST | Updated version of record | https://www.mdpi.com/2073-4441/9/4/269/pdf |
| article pdf uploaded. | 11 April 2017 12:43 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/4/269/pdf-vor |
