| article html file updated | 8 February 2020 03:32 CET | Update | https://www.mdpi.com/2072-6651/9/4/138 |
| article html file updated | 24 September 2019 07:25 CEST | Update | - |
| article html file updated | 4 May 2019 02:19 CEST | Update | - |
| article html file updated | 28 April 2017 11:16 CEST | Update | - |
| article html file updated | 13 April 2017 14:18 CEST | Original file | - |
| article xml uploaded. | 13 April 2017 14:17 CEST | Original file | https://www.mdpi.com/2072-6651/9/4/138/xml |
| article pdf uploaded. | 13 April 2017 14:17 CEST | Version of Record | https://www.mdpi.com/2072-6651/9/4/138/pdf |
