| article html file updated | 8 February 2020 07:32 CET | Update | https://www.mdpi.com/2072-6694/9/6/64 |
| article html file updated | 25 September 2019 04:32 CEST | Update | - |
| article html file updated | 3 May 2019 18:52 CEST | Update | - |
| article html file updated | 27 June 2017 09:56 CEST | Update | - |
| article html file updated | 5 June 2017 15:07 CEST | Original file | - |
| article xml uploaded. | 5 June 2017 15:05 CEST | Original file | https://www.mdpi.com/2072-6694/9/6/64/xml |
| article pdf uploaded. | 5 June 2017 15:05 CEST | Version of Record | https://www.mdpi.com/2072-6694/9/6/64/pdf |
