| article html file updated | 9 February 2020 12:08 CET | Update | https://www.mdpi.com/2079-9721/6/2/23 |
| article html file updated | 2 October 2019 04:38 CEST | Update | - |
| article html file updated | 1 May 2019 06:53 CEST | Update | - |
| article html file updated | 17 April 2019 06:55 CEST | Update | - |
| article html file updated | 29 March 2019 11:49 CET | Update | - |
| article html file updated | 3 April 2018 12:24 CEST | Update | - |
| article html file updated | 1 April 2018 23:02 CEST | Original file | - |
| article xml uploaded. | 1 April 2018 12:21 CEST | Original file | https://www.mdpi.com/2079-9721/6/2/23/xml |
| article pdf uploaded. | 1 April 2018 12:21 CEST | Version of Record | https://www.mdpi.com/2079-9721/6/2/23/pdf |
