| article html file updated | 6 February 2020 11:24 CET | Update | https://www.mdpi.com/2076-3921/3/3/526 |
| article html file updated | 21 March 2019 22:55 CET | Update | N/A |
| article html file updated | 20 August 2015 15:10 CEST | Original file | N/A |
| article pdf uploaded. | 12 August 2014 15:30 CEST | Version of Record | https://www.mdpi.com/2076-3921/3/3/526/pdf |
