| article html file updated | 7 February 2020 03:01 CET | Update | https://www.mdpi.com/2227-9032/4/1/3 |
| article html file updated | 6 May 2019 03:22 CEST | Update | - |
| article html file updated | 26 March 2019 17:42 CET | Update | - |
| article html file updated | 18 May 2016 12:20 CEST | Original file | - |
| article pdf uploaded. | 4 January 2016 15:27 CET | Version of Record | https://www.mdpi.com/2227-9032/4/1/3/pdf |
| article xml uploaded. | 4 January 2016 15:27 CET | Original file | https://www.mdpi.com/2227-9032/4/1/3/xml |
