| article html file updated | 8 February 2020 21:32 CET | Update | https://www.mdpi.com/2226-471X/2/4/23 |
| article html file updated | 2 May 2019 14:14 CEST | Update | - |
| article html file updated | 18 April 2019 11:54 CEST | Update | - |
| article html file updated | 17 November 2017 16:11 CET | Original file | - |
| article xml uploaded. | 17 November 2017 16:09 CET | Original file | https://www.mdpi.com/2226-471X/2/4/23/xml |
| article pdf uploaded. | 17 November 2017 16:09 CET | Version of Record | https://www.mdpi.com/2226-471X/2/4/23/pdf |
