| article html file updated | 6 February 2020 03:04 CET | Update | https://www.mdpi.com/2073-4344/3/3/588 |
| article html file updated | 8 May 2019 03:09 CEST | Update | - |
| article html file updated | 21 March 2019 00:54 CET | Update | - |
| article html file updated | 17 June 2015 11:01 CEST | Original file | - |
| article pdf uploaded. | 8 July 2013 14:34 CEST | Version of Record | https://www.mdpi.com/2073-4344/3/3/588/pdf |
