| article html file updated | 6 February 2020 19:59 CET | Update | https://www.mdpi.com/2077-1444/6/2/742 |
| article html file updated | 20 September 2019 23:15 CEST | Update | N/A |
| article html file updated | 6 May 2019 17:10 CEST | Update | N/A |
| article html file updated | 26 March 2019 05:16 CET | Update | N/A |
| article html file updated | 21 August 2015 14:01 CEST | Original file | N/A |
| article pdf uploaded. | 23 June 2015 14:58 CEST | Version of Record | https://www.mdpi.com/2077-1444/6/2/742/pdf |
