| article html file updated | 6 February 2020 16:03 CET | Update | https://www.mdpi.com/2227-7099/3/1/37 |
| article html file updated | 7 May 2019 00:48 CEST | Update | - |
| article html file updated | 25 March 2019 21:55 CET | Update | - |
| article html file updated | 10 October 2015 10:08 CEST | Update | - |
| article xml file uploaded | 10 October 2015 10:08 CEST | Original file | https://www.mdpi.com/2227-7099/3/1/37/xml |
| article html file updated | 21 August 2015 07:48 CEST | Original file | - |
| article pdf uploaded. | 16 February 2015 15:32 CET | Version of Record | https://www.mdpi.com/2227-7099/3/1/37/pdf |
