| article html file updated | 6 February 2020 00:51 CET | Update | https://www.mdpi.com/2073-4360/5/1/269 |
| article html file updated | 8 May 2019 07:41 CEST | Update | - |
| article html file updated | 20 March 2019 19:23 CET | Update | - |
| article html file updated | 17 June 2015 07:09 CEST | Original file | - |
| article pdf uploaded. | 7 March 2013 13:31 CET | Updated version of record | https://www.mdpi.com/2073-4360/5/1/269/pdf |
| article pdf uploaded. | 6 March 2013 11:48 CET | Version of Record | https://www.mdpi.com/2073-4360/5/1/269/pdf-vor |
