| article html file updated | 7 February 2020 03:16 CET | Update | https://www.mdpi.com/2227-9032/4/1/8 |
| article html file updated | 6 May 2019 02:53 CEST | Update | - |
| article html file updated | 26 March 2019 18:08 CET | Update | - |
| article html file updated | 18 May 2016 12:21 CEST | Original file | - |
| article pdf uploaded. | 11 January 2016 14:22 CET | Version of Record | https://www.mdpi.com/2227-9032/4/1/8/pdf |
| article xml uploaded. | 11 January 2016 14:22 CET | Original file | https://www.mdpi.com/2227-9032/4/1/8/xml |
