| article html file updated | 9 February 2020 13:21 CET | Update | https://www.mdpi.com/2227-9717/6/4/34 |
| article html file updated | 2 October 2019 11:58 CEST | Update | - |
| article html file updated | 1 May 2019 04:25 CEST | Update | - |
| article html file updated | 17 April 2019 04:43 CEST | Update | - |
| article html file updated | 29 March 2019 14:36 CET | Update | - |
| article html file updated | 1 May 2018 05:36 CEST | Update | - |
| article html file updated | 11 April 2018 10:57 CEST | Original file | - |
| article xml uploaded. | 11 April 2018 10:56 CEST | Original file | https://www.mdpi.com/2227-9717/6/4/34/xml |
| article pdf uploaded. | 11 April 2018 10:56 CEST | Version of Record | https://www.mdpi.com/2227-9717/6/4/34/pdf |
