| article html file updated | 6 February 2020 11:12 CET | Update | https://www.mdpi.com/2304-6740/2/3/424 |
| article html file updated | 7 May 2019 10:33 CEST | Update | N/A |
| article html file updated | 21 March 2019 22:19 CET | Update | N/A |
| article html file updated | 20 August 2015 14:25 CEST | Original file | N/A |
| article pdf uploaded. | 4 August 2014 14:05 CEST | Version of Record | https://www.mdpi.com/2304-6740/2/3/424/pdf |
