| article html file updated | 8 February 2020 19:36 CET | Update | https://www.mdpi.com/2218-6581/6/4/30 |
| article html file updated | 28 September 2019 01:15 CEST | Update | - |
| article html file updated | 2 May 2019 18:37 CEST | Update | - |
| article html file updated | 2 January 2018 10:43 CET | Update | - |
| article html file updated | 27 October 2017 12:51 CEST | Original file | - |
| article xml uploaded. | 27 October 2017 12:49 CEST | Update | https://www.mdpi.com/2218-6581/6/4/30/xml |
| article xml uploaded. | 27 October 2017 12:49 CEST | Original file | - |
| article pdf uploaded. | 27 October 2017 12:49 CEST | Version of Record | https://www.mdpi.com/2218-6581/6/4/30/pdf |
