| article html file updated | 6 February 2020 10:45 CET | Update | https://www.mdpi.com/2079-9292/3/3/409 |
| article html file updated | 7 May 2019 11:33 CEST | Update | - |
| article html file updated | 21 March 2019 20:59 CET | Original file | - |
| article pdf uploaded. | 21 July 2014 10:28 CEST | Updated version of record | https://www.mdpi.com/2079-9292/3/3/409/pdf |
| article pdf uploaded. | 16 July 2014 13:58 CEST | Version of Record | https://www.mdpi.com/2079-9292/3/3/409/pdf-vor |
