| article html file updated | 6 February 2020 19:15 CET | Update | https://www.mdpi.com/2220-9964/4/2/942 |
| article html file updated | 6 May 2019 18:41 CEST | Update | - |
| article html file updated | 26 March 2019 03:54 CET | Update | - |
| article html file updated | 21 August 2015 12:55 CEST | Update | - |
| article html file updated | 8 July 2015 10:59 CEST | Original file | - |
| article xml file uploaded | 8 July 2015 10:59 CEST | Original file | https://www.mdpi.com/2220-9964/4/2/942/xml |
| article pdf uploaded. | 1 June 2015 14:00 CEST | Version of Record | https://www.mdpi.com/2220-9964/4/2/942/pdf |
