| article html file updated | 7 February 2020 01:28 CET | Update | https://www.mdpi.com/2073-4344/5/4/2039 |
| article html file updated | 6 May 2019 06:31 CEST | Update | - |
| article html file updated | 26 March 2019 15:14 CET | Original file | - |
| article pdf uploaded. | 27 November 2015 12:03 CET | Version of Record | https://www.mdpi.com/2073-4344/5/4/2039/pdf |
| article xml uploaded. | 27 November 2015 12:03 CET | Original file | https://www.mdpi.com/2073-4344/5/4/2039/xml |
