| article html file updated | 8 February 2020 02:54 CET | Update | https://www.mdpi.com/2079-6412/7/4/50 |
| article html file updated | 24 September 2019 04:00 CEST | Update | - |
| article html file updated | 4 May 2019 03:36 CEST | Update | - |
| article html file updated | 28 April 2017 05:43 CEST | Update | - |
| article html file updated | 4 April 2017 14:01 CEST | Original file | - |
| article xml uploaded. | 4 April 2017 13:59 CEST | Update | https://www.mdpi.com/2079-6412/7/4/50/xml |
| article pdf uploaded. | 4 April 2017 13:59 CEST | Version of Record | https://www.mdpi.com/2079-6412/7/4/50/pdf |
