| article html file updated | 9 February 2020 00:34 CET | Update | https://www.mdpi.com/2227-9067/4/12/111 |
| article html file updated | 29 September 2019 08:04 CEST | Update | - |
| article html file updated | 2 May 2019 07:31 CEST | Update | - |
| article html file updated | 18 April 2019 05:22 CEST | Update | - |
| article html file updated | 2 January 2018 18:08 CET | Update | - |
| article html file updated | 19 December 2017 14:15 CET | Original file | - |
| article xml uploaded. | 19 December 2017 14:14 CET | Original file | https://www.mdpi.com/2227-9067/4/12/111/xml |
| article pdf uploaded. | 19 December 2017 14:14 CET | Version of Record | https://www.mdpi.com/2227-9067/4/12/111/pdf |
