| article html file updated | 8 February 2020 03:23 CET | Update | https://www.mdpi.com/2297-8747/22/2/30 |
| article html file updated | 24 September 2019 06:37 CEST | Update | N/A |
| article html file updated | 4 May 2019 02:36 CEST | Original file | N/A |
| article pdf uploaded. | 11 April 2017 16:11 CEST | Version of Record | https://www.mdpi.com/2297-8747/22/2/30/pdf |
