| article html file updated | 8 February 2020 17:54 CET | Update | https://new.mdpi.com/2226-471X/2/4/20 |
| article html file updated | 27 September 2019 14:11 CEST | Update | - |
| article html file updated | 2 May 2019 22:31 CEST | Update | - |
| article html file updated | 10 October 2017 11:53 CEST | Original file | - |
| article xml uploaded. | 10 October 2017 11:52 CEST | Original file | https://new.mdpi.com/2226-471X/2/4/20/xml |
| article pdf uploaded. | 10 October 2017 11:52 CEST | Updated version of record | https://new.mdpi.com/2226-471X/2/4/20/pdf |
| article pdf uploaded. | 6 October 2017 15:24 CEST | Version of Record | https://new.mdpi.com/2226-471X/2/4/20/pdf-vor |
