| article html file updated | 8 February 2020 06:39 CET | Update | https://www.mdpi.com/2072-6694/9/6/55 |
| article html file updated | 25 September 2019 00:04 CEST | Update | - |
| article html file updated | 3 May 2019 20:30 CEST | Update | - |
| article html file updated | 27 June 2017 09:56 CEST | Update | - |
| article html file updated | 26 May 2017 05:59 CEST | Original file | - |
| article xml uploaded. | 26 May 2017 05:58 CEST | Original file | https://www.mdpi.com/2072-6694/9/6/55/xml |
| article pdf uploaded. | 26 May 2017 05:58 CEST | Updated version of record | https://www.mdpi.com/2072-6694/9/6/55/pdf |
| article pdf uploaded. | 24 May 2017 16:15 CEST | Version of Record | https://www.mdpi.com/2072-6694/9/6/55/pdf-vor |
