| article html file updated | 7 February 2020 04:15 CET | Update | https://www.mdpi.com/2227-9040/4/1/3 |
| article html file updated | 6 May 2019 01:02 CEST | Update | - |
| article html file updated | 26 March 2019 20:03 CET | Update | - |
| article html file updated | 29 March 2016 07:15 CEST | Original file | - |
| article pdf uploaded. | 4 February 2016 12:01 CET | Version of Record | https://www.mdpi.com/2227-9040/4/1/3/pdf |
| article xml uploaded. | 4 February 2016 12:01 CET | Original file | https://www.mdpi.com/2227-9040/4/1/3/xml |
