| article html file updated | 8 February 2020 03:01 CET | Update | https://www.mdpi.com/2073-4441/9/4/261 |
| article html file updated | 24 September 2019 04:38 CEST | Update | - |
| article html file updated | 4 May 2019 03:19 CEST | Update | - |
| article html file updated | 28 April 2017 11:24 CEST | Update | - |
| article html file updated | 10 April 2017 09:59 CEST | Original file | - |
| article xml uploaded. | 10 April 2017 09:58 CEST | Update | https://www.mdpi.com/2073-4441/9/4/261/xml |
| article pdf uploaded. | 10 April 2017 09:58 CEST | Updated version of record | https://www.mdpi.com/2073-4441/9/4/261/pdf |
| article pdf uploaded. | 6 April 2017 12:28 CEST | Version of Record | https://www.mdpi.com/2073-4441/9/4/261/pdf-vor |
