| article html file updated | 6 February 2020 10:46 CET | Update | https://www.mdpi.com/2073-4352/4/3/342 |
| article html file updated | 7 May 2019 11:31 CEST | Update | N/A |
| article html file updated | 21 March 2019 21:02 CET | Update | N/A |
| article html file updated | 20 August 2015 12:56 CEST | Original file | N/A |
| article pdf uploaded. | 16 July 2014 17:34 CEST | Version of Record | https://www.mdpi.com/2073-4352/4/3/342/pdf |
