| article html file updated | 23 September 2021 04:05 CEST | Update | https://www.mdpi.com/2073-8994/9/4/52 |
| article html file updated | 8 February 2020 03:06 CET | Update | - |
| article html file updated | 4 May 2019 03:10 CEST | Update | - |
| article html file updated | 28 April 2017 07:15 CEST | Update | - |
| article html file updated | 7 April 2017 13:05 CEST | Original file | - |
| article xml uploaded. | 7 April 2017 13:04 CEST | Update | https://www.mdpi.com/2073-8994/9/4/52/xml |
| article pdf uploaded. | 7 April 2017 13:04 CEST | Updated version of record | https://www.mdpi.com/2073-8994/9/4/52/pdf |
| article pdf uploaded. | 7 April 2017 11:41 CEST | Version of Record | https://www.mdpi.com/2073-8994/9/4/52/pdf-vor |
