| article html file updated | 8 February 2020 07:36 CET | Update | https://www.mdpi.com/2227-9067/4/6/46 |
| article html file updated | 25 September 2019 04:57 CEST | Update | - |
| article html file updated | 3 May 2019 18:44 CEST | Update | - |
| article html file updated | 27 June 2017 10:01 CEST | Update | - |
| article html file updated | 7 June 2017 11:34 CEST | Original file | - |
| article xml uploaded. | 7 June 2017 11:32 CEST | Original file | https://www.mdpi.com/2227-9067/4/6/46/xml |
| article pdf uploaded. | 7 June 2017 11:32 CEST | Updated version of record | https://www.mdpi.com/2227-9067/4/6/46/pdf |
| article pdf uploaded. | 6 June 2017 13:15 CEST | Version of Record | https://www.mdpi.com/2227-9067/4/6/46/pdf-vor |
