| article html file updated | 7 February 2020 00:40 CET | Update | https://www.mdpi.com/2227-7390/3/4/1069 |
| article html file updated | 21 September 2019 06:02 CEST | Update | N/A |
| article html file updated | 6 May 2019 07:33 CEST | Update | N/A |
| article html file updated | 26 March 2019 14:15 CET | Original file | N/A |
| article pdf uploaded. | 6 November 2015 12:45 CET | Version of Record | https://www.mdpi.com/2227-7390/3/4/1069/pdf |
