| article html file updated | 6 February 2020 15:05 CET | Update | https://www.mdpi.com/2079-7737/4/1/41 |
| article html file updated | 7 May 2019 02:39 CEST | Update | - |
| article html file updated | 25 March 2019 20:20 CET | Update | - |
| article html file updated | 21 August 2015 05:34 CEST | Update | - |
| article html file updated | 1 April 2015 11:09 CEST | Original file | - |
| article xml file uploaded | 1 April 2015 11:09 CEST | Original file | https://www.mdpi.com/2079-7737/4/1/41/xml |
| article pdf uploaded. | 9 January 2015 15:30 CET | Version of Record | https://www.mdpi.com/2079-7737/4/1/41/pdf |
