| article html file updated | 7 February 2020 01:33 CET | Update | https://www.mdpi.com/2218-1997/1/3/446 |
| article html file updated | 6 May 2019 06:23 CEST | Update | - |
| article html file updated | 26 March 2019 15:21 CET | Update | - |
| article html file updated | 26 April 2016 09:52 CEST | Original file | - |
| article pdf uploaded. | 14 December 2015 11:23 CET | Updated version of record | https://www.mdpi.com/2218-1997/1/3/446/pdf |
| article pdf uploaded. | 1 December 2015 14:34 CET | Version of Record | https://www.mdpi.com/2218-1997/1/3/446/pdf-vor |
| article xml uploaded. | 1 December 2015 14:34 CET | Original file | https://www.mdpi.com/2218-1997/1/3/446/xml |
