| article html file updated | 7 February 2020 03:49 CET | Update | https://www.mdpi.com/2077-0375/6/1/10 |
| article html file updated | 6 May 2019 01:50 CEST | Update | N/A |
| article html file updated | 26 March 2019 19:13 CET | Update | N/A |
| article html file updated | 30 March 2016 07:59 CEST | Original file | N/A |
| article pdf uploaded. | 25 January 2016 11:11 CET | Version of Record | https://www.mdpi.com/2077-0375/6/1/10/pdf |
