| article html file updated | 6 February 2020 20:59 CET | Update | https://www.mdpi.com/2079-9292/4/3/424 |
| article html file updated | 6 May 2019 15:06 CEST | Update | - |
| article html file updated | 26 March 2019 07:15 CET | Update | - |
| article html file updated | 15 October 2015 07:24 CEST | Update | - |
| article xml file uploaded | 15 October 2015 07:24 CEST | Original file | https://www.mdpi.com/2079-9292/4/3/424/xml |
| article html file updated | 21 August 2015 15:12 CEST | Original file | - |
| article pdf uploaded. | 23 July 2015 13:32 CEST | Version of Record | https://www.mdpi.com/2079-9292/4/3/424/pdf |
