| article html file updated | 8 February 2020 02:20 CET | Update | https://www.mdpi.com/2072-6694/9/4/28 |
| article html file updated | 4 May 2019 04:52 CEST | Update | - |
| article html file updated | 28 April 2017 05:34 CEST | Update | - |
| article html file updated | 28 March 2017 10:00 CEST | Original file | - |
| article xml uploaded. | 28 March 2017 09:59 CEST | Original file | https://www.mdpi.com/2072-6694/9/4/28/xml |
| article pdf uploaded. | 28 March 2017 09:59 CEST | Updated version of record | https://www.mdpi.com/2072-6694/9/4/28/pdf |
| article pdf uploaded. | 27 March 2017 11:50 CEST | Version of Record | https://www.mdpi.com/2072-6694/9/4/28/pdf-vor |
