| article html file updated | 6 February 2020 07:29 CET | Update | https://www.mdpi.com/2227-9717/2/1/180 |
| article html file updated | 7 May 2019 18:12 CEST | Update | - |
| article html file updated | 21 March 2019 12:52 CET | Update | - |
| article html file updated | 19 August 2015 21:31 CEST | Update | - |
| article html file updated | 24 June 2014 12:23 CEST | Original file | - |
| article xml file uploaded | 24 June 2014 12:23 CEST | Original file | https://www.mdpi.com/2227-9717/2/1/180/xml |
| article pdf uploaded. | 24 February 2014 13:33 CET | Version of Record | https://www.mdpi.com/2227-9717/2/1/180/pdf |
