| article html file updated | 8 February 2020 06:52 CET | Update | https://www.mdpi.com/2071-1050/9/6/903 |
| article html file updated | 25 September 2019 01:11 CEST | Update | - |
| article html file updated | 3 May 2019 20:07 CEST | Update | - |
| article html file updated | 28 June 2017 14:33 CEST | Update | - |
| article html file updated | 27 May 2017 09:40 CEST | Original file | - |
| article xml uploaded. | 27 May 2017 09:39 CEST | Original file | https://www.mdpi.com/2071-1050/9/6/903/xml |
| article pdf uploaded. | 27 May 2017 09:39 CEST | Version of Record | https://www.mdpi.com/2071-1050/9/6/903/pdf |
