| article html file updated | 8 February 2020 04:13 CET | Update | https://www.mdpi.com/2072-6643/9/4/420 |
| article html file updated | 24 September 2019 11:26 CEST | Update | - |
| article html file updated | 4 May 2019 01:02 CEST | Update | - |
| article html file updated | 28 April 2017 11:54 CEST | Update | - |
| article html file updated | 23 April 2017 11:52 CEST | Original file | - |
| article xml uploaded. | 23 April 2017 11:51 CEST | Update | https://www.mdpi.com/2072-6643/9/4/420/xml |
| article pdf uploaded. | 23 April 2017 11:51 CEST | Version of Record | https://www.mdpi.com/2072-6643/9/4/420/pdf |
