| article html file updated | 6 February 2020 06:08 CET | Update | https://www.mdpi.com/2224-2708/2/4/761 |
| article html file updated | 7 May 2019 20:59 CEST | Update | - |
| article html file updated | 21 March 2019 09:15 CET | Update | - |
| article html file updated | 21 July 2017 03:53 CEST | Update | - |
| article html file updated | 21 July 2017 03:52 CEST | Update | - |
| article html file updated | 21 July 2017 03:51 CEST | Original file | - |
| article xml uploaded. | 21 July 2017 03:49 CEST | Original file | https://www.mdpi.com/2224-2708/2/4/761/xml |
| article pdf uploaded. | 11 December 2013 16:37 CET | Version of Record | https://www.mdpi.com/2224-2708/2/4/761/pdf |
