| article html file updated | 7 February 2020 02:21 CET | Update | https://www.mdpi.com/2076-3417/5/4/1904 |
| article html file updated | 6 May 2019 04:43 CEST | Update | - |
| article html file updated | 26 March 2019 16:41 CET | Original file | - |
| article pdf uploaded. | 17 December 2015 14:56 CET | Version of Record | https://www.mdpi.com/2076-3417/5/4/1904/pdf |
| article xml uploaded. | 17 December 2015 14:56 CET | Original file | https://www.mdpi.com/2076-3417/5/4/1904/xml |
