| article html file updated | 7 February 2020 05:05 CET | Update | https://www.mdpi.com/2227-7099/4/1/3 |
| article html file updated | 21 September 2019 12:03 CEST | Update | - |
| article html file updated | 5 May 2019 23:09 CEST | Update | - |
| article html file updated | 26 March 2019 21:49 CET | Update | - |
| article html file updated | 29 March 2016 07:37 CEST | Original file | - |
| article pdf uploaded. | 26 February 2016 10:29 CET | Version of Record | https://www.mdpi.com/2227-7099/4/1/3/pdf |
| article xml uploaded. | 26 February 2016 10:29 CET | Original file | https://www.mdpi.com/2227-7099/4/1/3/xml |
