| article html file updated | 8 February 2020 08:59 CET | Update | https://www.mdpi.com/2072-6643/9/7/639 |
| article html file updated | 25 September 2019 12:07 CEST | Update | - |
| article html file updated | 3 May 2019 16:08 CEST | Update | - |
| article html file updated | 2 August 2017 04:01 CEST | Update | - |
| article html file updated | 22 June 2017 13:26 CEST | Original file | - |
| article xml uploaded. | 22 June 2017 13:25 CEST | Original file | https://www.mdpi.com/2072-6643/9/7/639/xml |
| article pdf uploaded. | 22 June 2017 13:25 CEST | Version of Record | https://www.mdpi.com/2072-6643/9/7/639/pdf |
