| article html file updated | 6 February 2020 17:00 CET | Update | https://www.mdpi.com/2079-9292/4/2/221 |
| article html file updated | 6 May 2019 23:04 CEST | Update | - |
| article html file updated | 25 March 2019 23:37 CET | Update | - |
| article html file updated | 21 August 2015 09:25 CEST | Update | - |
| article html file updated | 17 July 2015 12:13 CEST | Original file | - |
| article xml file uploaded | 17 July 2015 12:13 CEST | Original file | https://www.mdpi.com/2079-9292/4/2/221/xml |
| article pdf uploaded. | 26 March 2015 09:09 CET | Version of Record | https://www.mdpi.com/2079-9292/4/2/221/pdf |
