| article html file updated | 6 February 2020 15:32 CET | Update | https://www.mdpi.com/2227-7099/3/1/2 |
| article html file updated | 7 May 2019 01:46 CEST | Update | - |
| article html file updated | 25 March 2019 21:05 CET | Update | - |
| article html file updated | 10 October 2015 10:07 CEST | Original file | - |
| article xml file uploaded | 10 October 2015 10:07 CEST | Original file | https://www.mdpi.com/2227-7099/3/1/2/xml |
| article pdf uploaded. | 28 January 2015 11:57 CET | Version of Record | https://www.mdpi.com/2227-7099/3/1/2/pdf |
