| article html file updated | 6 February 2020 09:11 CET | Update | https://www.mdpi.com/2076-0760/3/2/242 |
| article html file updated | 20 September 2019 08:14 CEST | Update | N/A |
| article html file updated | 7 May 2019 14:41 CEST | Update | N/A |
| article html file updated | 21 March 2019 16:53 CET | Update | N/A |
| article html file updated | 5 May 2016 08:01 CEST | Original file | N/A |
| article pdf uploaded. | 12 May 2014 14:37 CEST | Version of Record | https://www.mdpi.com/2076-0760/3/2/242/pdf |
