| article html file updated | 8 February 2020 03:14 CET | Update | https://www.mdpi.com/2076-3425/7/4/40 |
| article html file updated | 24 September 2019 05:50 CEST | Update | - |
| article html file updated | 4 May 2019 02:53 CEST | Update | - |
| article html file updated | 28 April 2017 05:33 CEST | Update | - |
| article html file updated | 10 April 2017 16:02 CEST | Original file | - |
| article xml uploaded. | 10 April 2017 16:01 CEST | Original file | https://www.mdpi.com/2076-3425/7/4/40/xml |
| article pdf uploaded. | 10 April 2017 16:01 CEST | Version of Record | https://www.mdpi.com/2076-3425/7/4/40/pdf |
