| article html file updated | 6 February 2020 05:03 CET | Update | https://www.mdpi.com/2075-471X/2/4/401 |
| article html file updated | 20 September 2019 02:20 CEST | Update | - |
| article html file updated | 7 May 2019 23:00 CEST | Update | - |
| article html file updated | 21 March 2019 06:23 CET | Original file | - |
| article pdf uploaded. | 24 October 2013 09:53 CEST | Updated version of record | https://www.mdpi.com/2075-471X/2/4/401/pdf |
| article pdf uploaded. | 24 October 2013 09:53 CEST | Updated version of record | https://www.mdpi.com/2075-471X/2/4/401/pdf-vor |
| article pdf uploaded. | 22 October 2013 12:22 CEST | Version of Record | https://www.mdpi.com/2075-471X/2/4/401/pdf-vor |
