| article html file updated | 6 February 2020 09:02 CET | Update | https://www.mdpi.com/1999-4893/7/2/206 |
| article html file updated | 7 May 2019 14:58 CEST | Update | N/A |
| article html file updated | 21 March 2019 16:34 CET | Original file | N/A |
| article pdf uploaded. | 15 May 2014 14:19 CEST | Updated version of record | https://www.mdpi.com/1999-4893/7/2/206/pdf |
| article pdf uploaded. | 13 May 2014 11:36 CEST | Updated version of record | https://www.mdpi.com/1999-4893/7/2/206/pdf-vor |
| article pdf uploaded. | 5 May 2014 15:45 CEST | Version of Record | https://www.mdpi.com/1999-4893/7/2/206/pdf-vor |
