| article html file updated | 6 February 2020 05:18 CET | Update | https://www.mdpi.com/1999-4893/6/4/702 |
| article html file updated | 7 May 2019 22:35 CEST | Update | N/A |
| article html file updated | 21 March 2019 07:00 CET | Update | N/A |
| article html file updated | 21 July 2017 03:55 CEST | Update | N/A |
| article html file updated | 21 July 2017 03:53 CEST | Update | N/A |
| article html file updated | 21 July 2017 03:53 CEST | Original file | N/A |
| article xml uploaded. | 21 July 2017 03:51 CEST | Original file | https://www.mdpi.com/1999-4893/6/4/702/xml |
| article pdf uploaded. | 1 November 2013 11:17 CET | Version of Record | https://www.mdpi.com/1999-4893/6/4/702/pdf |
