| article html file updated | 7 February 2020 03:21 CET | Update | https://www.mdpi.com/2071-1050/8/1/73 |
| article html file updated | 6 May 2019 02:44 CEST | Update | N/A |
| article html file updated | 26 March 2019 18:17 CET | Original file | N/A |
| article pdf uploaded. | 13 January 2016 07:56 CET | Version of Record | https://www.mdpi.com/2071-1050/8/1/73/pdf |
| article xml uploaded. | 13 January 2016 07:56 CET | Original file | https://www.mdpi.com/2071-1050/8/1/73/xml |
