| article html file updated | 6 February 2020 01:03 CET | Update | https://www.mdpi.com/2073-4360/5/1/284 |
| article html file updated | 8 May 2019 07:15 CEST | Update | - |
| article html file updated | 20 March 2019 19:53 CET | Update | - |
| article html file updated | 17 June 2015 07:37 CEST | Update | - |
| article html file updated | 14 August 2014 12:04 CEST | Original file | - |
| article xml file uploaded | 14 August 2014 12:04 CEST | Original file | https://www.mdpi.com/2073-4360/5/1/284/xml |
| article pdf uploaded. | 15 March 2013 14:00 CET | Version of Record | https://www.mdpi.com/2073-4360/5/1/284/pdf |
