| article html file updated | 7 February 2020 02:27 CET | Update | https://www.mdpi.com/1999-4915/7/12/2969 |
| article html file updated | 6 May 2019 04:32 CEST | Update | - |
| article html file updated | 26 March 2019 16:50 CET | Original file | - |
| article pdf uploaded. | 19 December 2015 07:37 CET | Version of Record | https://www.mdpi.com/1999-4915/7/12/2969/pdf |
| article xml uploaded. | 19 December 2015 07:37 CET | Original file | https://www.mdpi.com/1999-4915/7/12/2969/xml |
