| article html file updated | 6 February 2020 03:17 CET | Update | https://www.mdpi.com/2224-2708/2/3/486 |
| article html file updated | 8 May 2019 02:44 CEST | Update | - |
| article html file updated | 21 March 2019 01:31 CET | Update | - |
| article html file updated | 26 July 2017 05:15 CEST | Original file | - |
| article xml uploaded. | 26 July 2017 05:13 CEST | Original file | https://www.mdpi.com/2224-2708/2/3/486/xml |
| article pdf uploaded. | 18 July 2013 11:34 CEST | Updated version of record | https://www.mdpi.com/2224-2708/2/3/486/pdf |
| article pdf uploaded. | 18 July 2013 11:32 CEST | Updated version of record | - |
| article pdf uploaded. | 18 July 2013 11:32 CEST | Updated version of record | - |
