| article html file updated | 7 February 2020 01:15 CET | Update | https://www.mdpi.com/2073-4344/5/4/2001 |
| article html file updated | 6 May 2019 06:49 CEST | Update | N/A |
| article html file updated | 26 March 2019 14:57 CET | Original file | N/A |
| article pdf uploaded. | 20 November 2015 17:48 CET | Version of Record | https://www.mdpi.com/2073-4344/5/4/2001/pdf |
| article xml uploaded. | 20 November 2015 17:48 CET | Original file | https://www.mdpi.com/2073-4344/5/4/2001/xml |
