| article html file updated | 7 February 2020 19:09 CET | Update | https://www.mdpi.com/2224-2708/5/4/18 |
| article html file updated | 4 May 2019 20:13 CEST | Update | - |
| article html file updated | 29 December 2016 06:44 CET | Update | - |
| article html file updated | 6 December 2016 11:11 CET | Original file | - |
| article xml uploaded. | 6 December 2016 11:09 CET | Update | https://www.mdpi.com/2224-2708/5/4/18/xml |
| article xml uploaded. | 6 December 2016 11:09 CET | Original file | - |
| article pdf uploaded. | 6 December 2016 11:09 CET | Version of Record | https://www.mdpi.com/2224-2708/5/4/18/pdf |
