| article html file updated | 7 February 2020 01:43 CET | Update | https://www.mdpi.com/2227-7390/3/4/1171 |
| article html file updated | 21 September 2019 07:09 CEST | Update | - |
| article html file updated | 6 May 2019 06:01 CEST | Update | - |
| article html file updated | 26 March 2019 15:40 CET | Original file | - |
| article pdf uploaded. | 3 December 2015 13:37 CET | Version of Record | https://www.mdpi.com/2227-7390/3/4/1171/pdf |
| article xml uploaded. | 3 December 2015 13:37 CET | Original file | https://www.mdpi.com/2227-7390/3/4/1171/xml |
