| article html file updated | 6 February 2020 10:41 CET | Update | https://www.mdpi.com/2079-9284/1/3/159 |
| article html file updated | 7 May 2019 11:41 CEST | Update | - |
| article html file updated | 21 March 2019 20:47 CET | Update | - |
| article html file updated | 20 August 2015 12:41 CEST | Original file | - |
| article pdf uploaded. | 16 July 2014 10:25 CEST | Updated version of record | https://www.mdpi.com/2079-9284/1/3/159/pdf |
| article pdf uploaded. | 14 July 2014 14:49 CEST | Version of Record | https://www.mdpi.com/2079-9284/1/3/159/pdf-vor |
