| article html file updated | 6 February 2020 06:42 CET | Update | https://www.mdpi.com/2079-9268/4/1/15 |
| article html file updated | 7 May 2019 19:52 CEST | Update | - |
| article html file updated | 21 March 2019 10:56 CET | Update | - |
| article html file updated | 19 August 2015 17:10 CEST | Update | - |
| article html file updated | 14 August 2014 12:06 CEST | Original file | - |
| article xml file uploaded | 14 August 2014 12:06 CEST | Original file | https://www.mdpi.com/2079-9268/4/1/15/xml |
| article pdf uploaded. | 10 January 2014 13:51 CET | Version of Record | https://www.mdpi.com/2079-9268/4/1/15/pdf |
