| article html file updated | 6 February 2020 09:59 CET | Update | https://www.mdpi.com/2076-0787/3/2/232 |
| article html file updated | 20 September 2019 09:19 CEST | Update | N/A |
| article html file updated | 7 May 2019 13:04 CEST | Update | N/A |
| article html file updated | 21 March 2019 18:56 CET | Update | N/A |
| article html file updated | 17 March 2017 10:36 CET | Original file | N/A |
| article pdf uploaded. | 16 June 2014 16:03 CEST | Version of Record | https://www.mdpi.com/2076-0787/3/2/232/pdf |
