| article html file updated | 6 February 2020 03:30 CET | Update | https://www.mdpi.com/1999-4893/6/3/430 |
| article html file updated | 8 May 2019 02:18 CEST | Update | N/A |
| article html file updated | 21 March 2019 02:09 CET | Update | N/A |
| article html file updated | 19 December 2016 11:28 CET | Original file | N/A |
| article pdf uploaded. | 30 July 2013 09:18 CEST | Updated version of record | https://www.mdpi.com/1999-4893/6/3/430/pdf |
| article pdf uploaded. | 30 July 2013 09:16 CEST | Updated version of record | N/A |
| article pdf uploaded. | 30 July 2013 09:15 CEST | Updated version of record | N/A |
