| article html file updated | 6 February 2020 10:56 CET | Update | https://www.mdpi.com/2075-5309/4/3/375 |
| article html file updated | 21 March 2019 21:33 CET | Update | - |
| article html file updated | 20 August 2015 13:30 CEST | Original file | - |
| article pdf uploaded. | 23 July 2014 13:02 CEST | Version of Record | https://www.mdpi.com/2075-5309/4/3/375/pdf |
