| article html file updated | 7 February 2020 03:21 CET | Update | https://www.mdpi.com/2227-9032/4/1/9 |
| article html file updated | 6 May 2019 02:43 CEST | Update | N/A |
| article html file updated | 26 March 2019 18:18 CET | Update | N/A |
| article html file updated | 18 May 2016 12:21 CEST | Original file | N/A |
| article pdf uploaded. | 13 January 2016 08:50 CET | Version of Record | https://www.mdpi.com/2227-9032/4/1/9/pdf |
| article xml uploaded. | 13 January 2016 08:50 CET | Original file | https://www.mdpi.com/2227-9032/4/1/9/xml |
