| article html file updated | 6 February 2020 13:22 CET | Update | https://www.mdpi.com/2224-2708/3/4/274 |
| article html file updated | 7 May 2019 06:03 CEST | Update | - |
| article html file updated | 25 March 2019 17:05 CET | Update | - |
| article html file updated | 21 July 2017 03:45 CEST | Update | - |
| article html file updated | 21 July 2017 03:44 CEST | Update | - |
| article html file updated | 21 July 2017 03:44 CEST | Original file | - |
| article xml uploaded. | 21 July 2017 03:42 CEST | Update | https://www.mdpi.com/2224-2708/3/4/274/xml |
| article pdf uploaded. | 4 November 2014 15:30 CET | Version of Record | https://www.mdpi.com/2224-2708/3/4/274/pdf |
