| article html file updated | 7 February 2020 02:52 CET | Update | https://www.mdpi.com/2071-1050/8/1/13 |
| article html file updated | 6 May 2019 03:36 CEST | Update | N/A |
| article html file updated | 26 March 2019 17:31 CET | Original file | N/A |
| article pdf uploaded. | 30 December 2015 13:19 CET | Version of Record | https://www.mdpi.com/2071-1050/8/1/13/pdf |
| article xml uploaded. | 30 December 2015 13:19 CET | Original file | https://www.mdpi.com/2071-1050/8/1/13/xml |
