| article html file updated | 9 February 2020 13:30 CET | Update | https://www.mdpi.com/2227-7072/6/2/42 |
| article html file updated | 2 October 2019 12:57 CEST | Update | - |
| article html file updated | 1 May 2019 04:07 CEST | Update | - |
| article html file updated | 17 April 2019 04:27 CEST | Update | - |
| article html file updated | 29 March 2019 14:56 CET | Update | - |
| article html file updated | 27 June 2018 20:19 CEST | Update | - |
| article html file updated | 12 April 2018 10:27 CEST | Original file | - |
| article xml uploaded. | 12 April 2018 10:26 CEST | Original file | https://www.mdpi.com/2227-7072/6/2/42/xml |
| article pdf uploaded. | 12 April 2018 10:26 CEST | Version of Record | https://www.mdpi.com/2227-7072/6/2/42/pdf |
