| article html file updated | 7 February 2020 01:03 CET | Update | https://www.mdpi.com/1424-8247/8/4/758 |
| article html file updated | 9 January 2020 14:38 CET | Update | N/A |
| article html file updated | 27 October 2017 10:49 CEST | Original file | N/A |
| article pdf uploaded. | 17 November 2015 11:53 CET | Version of Record | https://www.mdpi.com/1424-8247/8/4/758/pdf |
| article xml uploaded. | 17 November 2015 11:53 CET | Original file | https://www.mdpi.com/1424-8247/8/4/758/xml |
