| article html file updated | 6 February 2020 10:34 CET | Update | https://www.mdpi.com/2227-7072/2/3/240 |
| article html file updated | 20 September 2019 10:16 CEST | Update | N/A |
| article html file updated | 7 May 2019 11:53 CEST | Update | N/A |
| article html file updated | 21 March 2019 20:29 CET | Update | N/A |
| article html file updated | 20 August 2015 12:15 CEST | Original file | N/A |
| article pdf uploaded. | 9 July 2014 11:42 CEST | Version of Record | https://www.mdpi.com/2227-7072/2/3/240/pdf |
